Key Takeaways
- Glapp is a free GLP-1 tracking app with a unique "Bodyphases" feature that predicts hunger and side effects throughout your dosing cycle
- GLP3 Planner offers different strengths: comprehensive microdosing support, retatrutide-specific resources, and shareable schedules with preview images
- Both tools are completely free. The choice comes down to feature focus, not pricing
- Glapp focuses on tracking (shot logging, side effects, weight), while GLP3 Planner focuses on schedule planning and pharmacokinetic visualization
- Many users find value in using both tools for different purposes
Glapp vs GLP3 Planner: Feature Comparison
Both Glapp and GLP3 Planner are free tools, so the decision comes down to which features matter most for your GLP-1 medication management.
| Feature | Glapp | GLP3 Planner |
|---|---|---|
| Price | Free | Free |
| Drug Level Visualization | ✓ Bodyphases | ✓ PK Curves |
| Shot Tracking | ✓ Full logging | Schedule planning |
| Side Effect Tracking | ✓ Yes | No |
| Weight Tracking | ✓ Yes | No |
| Injection Reminders | ✓ Yes | No |
| Microdosing Protocols | Limited | ✓ Full support |
| Retatrutide Support | Limited | ✓ Full (with guides) |
| Shareable Schedules | No | ✓ With previews |
| Educational Content | Glapp Wisdom (AI) | Resource articles |
| Privacy Focus | ✓ Strong | ✓ Strong |
| Mobile App | Web + Mobile | Web (mobile-optimized) |
What is Glapp?
Glapp (glapp.io) is a free GLP-1 tracking app built by GLP-1 users and health-tech professionals. Its standout feature is "Bodyphases," a visualization that shows where you are in your medication cycle (Peak Effect, Absorption, Elimination) to help predict when hunger and side effects might occur.
Unlike many competitors, Glapp is completely free with no premium paywall. The developers take a strong privacy stance, explicitly stating they don't sell user data. The app offers comprehensive tracking including shot logging, side effect monitoring, weight tracking, and injection reminders. Features that would cost $49.99/year with competing app Shotsy.
Glapp Strengths
- Bodyphases visualization: Unique feature that predicts hunger and side effects based on where you are in the medication cycle
- Comprehensive tracking: Shot logging, side effects, weight, and injection reminders all in one free app
- Privacy-first: Explicit commitment to not selling user data
- On-track check: Compares your results against clinical trial data and similar users
- Glapp Wisdom: AI-powered search tool for GLP-1 questions using research and community experience
- Clean UI: Dark mode, straightforward design, readable charts
- Clinician-endorsed: Has testimonials from medical professionals
Glapp Limitations
- Limited medication support: Primarily covers semaglutide and tirzepatide; limited retatrutide support
- No microdosing protocols: Designed for standard weekly dosing, not split-dose experimentation
- No schedule sharing: Can't generate shareable links to show your protocol to others
- No desktop app: Browser-based and mobile, but no dedicated desktop experience
- No fitness integration: Doesn't connect with fitness trackers or gym apps
- Limited combination support: Focused on single-agent GLP-1 use, not medication stacks
GLP3 Planner: Different Approach, Different Strengths
Where Glapp excels at comprehensive tracking, GLP3 Planner takes a different approach focused on schedule planning and pharmacokinetic visualization. Rather than logging what you've taken, GLP3 Planner helps you model and understand different dosing strategies, especially valuable for users exploring microdosing or retatrutide.
What GLP3 Planner Offers That Glapp Doesn't
Microdosing Protocol Support
Full support for split-dosing experimentation. Model twice-weekly, three-times-weekly, every-other-day, or daily microdosing and see exactly how different frequencies affect your peak-to-trough ratios.
Comprehensive Retatrutide Support
Dedicated resources for retatrutide including titration guides, dosing strategies, and educational content. Glapp has limited support for this emerging triple-agonist medication.
Shareable Schedules with Previews
Generate URLs with automatically created preview images. Share your dosing schedule on Reddit, in communities, or with your healthcare provider. Recipients see a visual preview before clicking.
Detailed PK Visualization
Traditional pharmacokinetic curves showing exact drug concentration over time. Different approach than Glapp's "phase" visualization. Some users prefer seeing the actual numbers and curves.
Microdosing Visualization Example
This three-times-weekly retatrutide schedule shows how split dosing creates a flatter concentration profile with reduced peaks, the kind of detailed modeling that GLP3 Planner specializes in.
View Interactive Schedule →
Glapp vs GLP3 Planner Features
Drug Level Visualization
Glapp (Bodyphases): Shows which "phase" of the medication cycle you're in (Peak Effect, Absorption, Elimination) to predict when hunger and side effects might occur. Uses a phase-based approach that's intuitive for users who want to know "where am I in my cycle?"
GLP3 Planner (PK Curves): Shows traditional pharmacokinetic concentration curves with actual drug levels over time. Better for users who want to see precise numbers, compare different dosing strategies, or understand the mathematical relationship between dose and concentration.
Winner: Depends on preference. Glapp's approach is more intuitive for day-to-day tracking. GLP3 Planner's approach is better for schedule planning and understanding "what if" scenarios.
Tracking vs. Planning
Glapp: Excels at tracking what you've actually done. Log injections, monitor side effects over time, track weight progress, get reminders for upcoming shots. This is a tracking-first tool.
GLP3 Planner: Excels at planning what you might do. Model different dosing strategies, compare protocols, understand how changes would affect your drug levels. This is a planning-first tool.
Winner: Glapp for comprehensive tracking; GLP3 Planner for schedule planning and experimentation.
Microdosing and Alternative Dosing
Glapp: Designed primarily for standard weekly dosing. While you can log any dose, the Bodyphases visualization and predictions are optimized for the weekly injection cycle.
GLP3 Planner: Built specifically for flexible dosing exploration. Create twice-weekly, three-times-weekly, every-other-day, or daily microdosing schedules with full visualization of how different frequencies affect concentration stability.
Winner: GLP3 Planner for microdosing support.
Medication Support
Glapp: Focuses on semaglutide (Ozempic, Wegovy) and tirzepatide (Mounjaro, Zepbound). Limited support for newer or experimental medications. Users have requested support for medication stacks.
GLP3 Planner: Full support for semaglutide, tirzepatide, and retatrutide with dedicated titration guides and dosing resources. The "GLP-3" in the name reflects special focus on retatrutide.
Winner: GLP3 Planner for retatrutide users; Tie for semaglutide and tirzepatide.
Educational Resources
Glapp (Glapp Wisdom): AI-powered search tool that answers GLP-1 questions using a combination of research literature and community experience. Interactive Q&A approach.
GLP3 Planner: Comprehensive written resource library with detailed articles on pharmacokinetics, microdosing science, titration strategies, and dosing protocols. Reference-style content you can study.
Winner: Depends on learning style. Glapp's AI is better for quick questions. GLP3 Planner's articles are better for deep understanding.
Sharing and Collaboration
Glapp: No schedule sharing functionality. Your tracking data stays within the app.
GLP3 Planner: Generate shareable URLs with automatically created preview images. When you share a link, recipients see a visual preview of your drug concentration chart. Great for getting feedback from communities or showing protocols to healthcare providers.
Winner: GLP3 Planner for sharing capabilities.
GLP-1 Half-Life Calculator Features
Understanding medication half-life is crucial for predicting when drug levels peak and when hunger returns. Both Glapp and GLP3 Planner use half-life calculations, but present them differently.
Glapp: Uses half-life data to power the Bodyphases visualization. You don't see raw half-life numbers, but the "Peak Effect" and "Elimination" phases are derived from semaglutide's ~7-day and tirzepatide's ~5-day half-lives.
GLP3 Planner: Functions as a dedicated GLP-1 half-life calculator, showing explicit drug concentration curves based on each medication's pharmacokinetic profile. The calculator models semaglutide (~7 day half-life), tirzepatide (~5 day half-life), and retatrutide (~6 day half-life) to show exactly when levels peak, plateau, and decline.
Winner: GLP3 Planner for users who want to see explicit half-life calculations and concentration curves; Glapp for users who prefer simplified phase-based guidance.
Microdosing Calculator Support
Microdosing (splitting your weekly dose across multiple injections) is increasingly popular for managing side effects and achieving more stable drug levels. How do these tools compare for microdosing support?
Glapp: Designed for standard weekly dosing. While you can log any injection, the Bodyphases predictions assume weekly injections. Users exploring split-dosing won't get accurate phase predictions.
GLP3 Planner: Built as a comprehensive microdosing calculator that fully supports alternative dosing frequencies. Model twice-weekly, three-times-weekly, every-other-day, or daily schedules and see exactly how splitting your dose affects peak-to-trough ratios. The visualization shows why microdosing creates flatter, more stable drug levels.
Winner: GLP3 Planner is the clear choice for microdosing. Glapp is better suited for standard weekly protocols.
Glapp or GLP3 Planner: Which Is Better?
Choose Glapp If You:
- Need comprehensive shot tracking with injection logging
- Want side effect monitoring to identify patterns
- Value weight tracking integrated with medication data
- Need injection reminders for your weekly dose
- Prefer the "Bodyphases" approach to understanding your cycle
- Use standard weekly dosing (not exploring microdosing)
- Want AI-powered Q&A for quick GLP-1 questions
- Prioritize privacy and don't want data sold
Choose GLP3 Planner If You:
- Want to explore microdosing or split-dosing protocols
- Are using or interested in retatrutide
- Need shareable schedules to discuss with others
- Prefer traditional pharmacokinetic curves over phase visualizations
- Want to compare different dosing strategies side-by-side
- Prefer in-depth written educational content
- Need to show your protocol to healthcare providers
- Don't need injection tracking or side effect logging
The best approach: Use both. They're both free, and they complement each other. Use Glapp for day-to-day tracking and reminders. Use GLP3 Planner for schedule planning, microdosing exploration, and when you need shareable visualizations. Many users find this combination gives them comprehensive coverage.
Try the Free GLP-1 Dose Calculator
GLP3 Planner specializes in what Glapp doesn't: microdosing protocols, retatrutide support, and shareable schedule visualizations. Try our free calculator to model different dosing strategies.
Other Glapp Alternatives
Beyond GLP3 Planner, here are other tools in the GLP-1 medication management space:
Shotsy
iOS & Android • $49.99/year
The market-leading paid GLP-1 tracker with comprehensive shot logging, side effect tracking, and Apple Health integration. Similar feature set to Glapp but with a subscription model. Best for users who want native mobile apps and don't mind paying for premium features. Glapp offers most of the same functionality for free.
Read our Shotsy comparison →GLP-1 Plotter
Web • Free
Community-built dose calculator from the Reddit GLP-1 communities. Focuses purely on drug concentration visualization without the tracking features. Simpler than both Glapp and GLP3 Planner but with strong community support via Telegram. Best for users who want minimal features and value community interaction.
Read our GLP-1 Plotter comparison →Dose AI
Web + Mobile • Freemium
A broader health app that includes GLP-1 tracking alongside meal planning and macro tracking. More comprehensive than single-purpose GLP-1 tools but potentially overwhelming if you just want medication management. Best for users who want integrated nutrition planning with their GLP-1 tracking.
Frequently Asked Questions
Is Glapp really free?
Yes, Glapp is genuinely free with no hidden paywalls. All core features (injection tracking, side effect monitoring, weight logging, Bodyphases visualization, and injection reminders) are available at no cost. Glapp offers optional paid "playbooks" ($9.99 each) for additional educational content, but these are supplementary guides, not core app functionality. The developers have explicitly committed to keeping the main app free while monetizing through optional add-ons.
What is Bodyphases in Glapp?
Bodyphases is Glapp's unique visualization feature that shows where you are in your medication cycle throughout the week. Rather than showing raw drug concentration numbers, it presents intuitive phases like Peak Effect (highest drug levels), Absorption (drug building up), and Elimination (drug declining). The goal is to help you predict when hunger might return and when side effects are most likely, making it easier to plan your week around your medication cycle.
Does Glapp support retatrutide?
Glapp has limited retatrutide support as of early 2026. The app primarily focuses on FDA-approved medications: semaglutide (Ozempic, Wegovy) and tirzepatide (Mounjaro, Zepbound). Users have requested expanded medication options including retatrutide and medication stacks. If retatrutide support is important to you, GLP3 Planner offers comprehensive retatrutide features including titration guides and microdosing protocols.
Can I use Glapp for microdosing?
You can log any dose in Glapp, but the app's Bodyphases visualization and predictions are optimized for standard weekly dosing. The "phases" assume a once-weekly injection cycle. For users exploring microdosing (twice-weekly, three-times-weekly, or daily dosing), GLP3 Planner provides better support with full visualization of how different frequencies affect drug concentration stability and peak-to-trough ratios.
Does Glapp sell my data?
No. Glapp explicitly states in their privacy policy that they do not sell user data. Their tagline "Your health data is personal. No data is sold or shared. Ever." reflects a privacy-first approach. This is a significant differentiator from some health apps that monetize user data. GLP3 Planner similarly prioritizes user privacy without data monetization.
Can I share my Glapp data with my doctor?
Glapp doesn't have a built-in sharing feature, but you can show your app to your doctor during appointments or take screenshots of your tracking data. If you need to send something before an appointment, GLP3 Planner's shareable links with preview images may be more convenient. You can generate a URL that shows your dosing schedule and drug concentration visualization, which your healthcare provider can view without needing the app.
Is Glapp or GLP3 Planner better?
Neither is universally "better." They serve different primary purposes. Glapp excels at comprehensive tracking: logging shots, monitoring side effects, tracking weight, and getting injection reminders. GLP3 Planner excels at schedule planning: exploring microdosing protocols, modeling different dosing strategies, and creating shareable visualizations. Many users find value in using both tools together since they're both free and complement each other's strengths.
Is Glapp better than GLP3 Planner?
Glapp is better for comprehensive tracking: if you need shot logging, side effect monitoring, weight tracking, and injection reminders all in one app. GLP3 Planner is better for schedule planning: if you want to explore microdosing protocols, model retatrutide dosing, or share visual schedules with others. Since both are free, many users use both tools together.
What's the best GLP-1 app for microdosing?
GLP3 Planner is the best free app for microdosing GLP-1 medications. It offers full support for split-dosing protocols including twice-weekly, three-times-weekly, every-other-day, and daily schedules. You can visualize how different frequencies affect peak-to-trough ratios and share your protocols with others. Glapp and other tracking apps are optimized for standard weekly dosing and don't offer the same microdosing visualization capabilities.
Is there a free wegovy calculator?
Yes, both Glapp and GLP3 Planner offer free Wegovy (semaglutide) calculators. Glapp shows Wegovy phases through its Bodyphases feature, helping you predict when hunger and side effects occur. GLP3 Planner shows explicit drug concentration curves and supports all Wegovy doses (0.25mg through 2.4mg) with the ability to model microdosing schedules. Both are completely free alternatives to paid apps that charge for similar visualization features.
What's the best tirzepatide dosing calculator?
For free tirzepatide dosing calculation, GLP3 Planner offers the most flexible option with full dose range support (2.5mg to 15mg), pharmacokinetic curves, and microdosing protocols. Glapp also tracks tirzepatide (Mounjaro/Zepbound) with Bodyphases visualization but is optimized for standard weekly dosing. Choose GLP3 Planner for schedule planning and visualization; choose Glapp for day-to-day tracking and reminders.
Is there a mounjaro half-life calculator?
GLP3 Planner functions as a Mounjaro half-life calculator, modeling tirzepatide's ~5-day half-life in its drug concentration charts. The calculator shows how Mounjaro levels rise after injection, peak around 24-72 hours, and gradually decline. Glapp also uses half-life calculations behind the scenes to power its Bodyphases feature, but doesn't show explicit concentration numbers. Both tools help you understand where you are in your dosing cycle.
How do I calculate my retatrutide dose?
For retatrutide dosing, GLP3 Planner offers a free calculator specifically designed for this triple-agonist medication. Standard retatrutide titration starts at 2mg weekly, increasing to 4mg, 8mg, and up to 12mg based on tolerance. The calculator models retatrutide's ~6-day half-life and supports both standard weekly dosing and microdosing protocols. Glapp has limited retatrutide support. See our complete retatrutide dosing guide for detailed titration schedules.
Related Resources
Complete Retatrutide Dosing Guide
Standard titration schedules, starting doses, microdosing protocols, and when to adjust your retatrutide dose.
Microdosing Retatrutide
Explore daily dosing protocols for retatrutide and how they compare to standard weekly injections.
GLP-1 Plotter Alternatives
Compare GLP-1 Plotter with GLP3 Planner and other free dose calculators for pharmacokinetic visualization.
Shotsy Alternatives
Looking for free alternatives to Shotsy's $49.99/year subscription? Compare features and find the best option.
Medical Disclaimer
This comparison is for informational purposes only. GLP-1 tracking apps and calculators are tools to help you understand your medication, not replacements for medical advice. Always consult with a qualified healthcare provider before starting, stopping, or modifying any medication regimen. Feature information in this article was accurate at time of publication (January 2026) but may change as apps evolve. Neither Glapp nor any alternative app should replace professional medical guidance.