SweatStacks vs GEMS Study
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
SweatStacks
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Introducing SweatStacks, your new fitness companion. We're about making world-class fitness accessible, bringing you detailed regimens, aka "stacks", from the industry's top professionals. With SweatStacks, your personalized training plan is a tap away. We generate a training calendar for you based on proven principles of progressive overload and training periodization. We've got your exercises, sets, and reps all sorted. Plus, we've got weight recommendations in the pipeline! For our big launch, we're featuring one exceptional goal - Dr. Andrew Huberman's "Foundational Fitness Protocol". It's a game-changer and it's just the beginning. Welcome to the next level of fitness with SweatStacks. Key Features: - Weekly Training Schedule: Know your upcoming workouts and easily keep track of recently completed sessions. Our interface is designed to keep you motivated and aware of your weekly regimen. - Automated Progress: We have a built-in progressive overload feature that smartly manages your sets and reps for each exercise. This ensures you're always challenging your body to adapt and grow stronger. - Visual Demonstrations: Stay confident with your form and routines. Each exercise comes with a demonstrative gif and an option to log the weight you lift. - Detailed Training History: Stay informed about your progress. Our app provides a detailed history of each exercise, including the weight you used, the number of reps you completed, and your perceived exertion. - Personalized Training Plans: Choose your fitness goal and have a suitable training plan created for you. Whether you're aiming to build muscle, lose fat, or enhance your overall strength, we have a plan tailored just for you. - Apple Health Integration: Sync your workouts directly to the Health app
GEMS Study
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GEMS is designed to help people make informed choices about their health. The app is only intended for use by participants in the GEMS study. It is not intended for the general public. App activation and use requires an access code and verification of study participantsβ identity. GEMS participants must install and set up the app to complete study enrollment.
Screenshots
Verdict
The clearest difference is update cadence: SweatStacks at every 10 days against GEMS Study's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
SweatStacks ships an update every 10 days, GEMS Study every 2 months. The most recent releases landed on September 15, 2026 and September 24, 2026 respectively.
| Parameter | SweatStacks | GEMS Study |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 10 days β better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details β not scored | ||
| Size | 740 MB | 152 MB |
| Age rating | 4+ | 17+ |
| Developer | Oftring Ventures, LLC | Kaiser Permanente |
In-app purchases
SweatStacks
No in-app purchases
GEMS Study
No in-app purchases









