Restrr vs Castra App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Restrr
Optimize your strength training and HIIT workouts with a smart rest countdown and automatic set counter. Stay focused with customizable notifications and live activity integration. Train more efficiently and effectively.
- Smart rest countdown
- Automatic set counter
- Live Activities & Dynamic Island integration
- Customizable notifications
- Workout optimization
Read full descriptionHide full description
Tired of guessing your rest periods and losing track of sets? Gym Timer is the essential tool for every serious athlete and gym-goer. Designed to keep your strength training, muscle building, and HIIT workouts on track, our app ensures you make the most of every second. Stop wasting time and start training with purpose. Features That Optimize Your Workout - Smart Rest Countdown: Our clear, easy-to-read rest countdown ensures you hit your next set at the perfect time, every time. - Automatic Set Counter: Focus on your reps, not your count. The app automatically tracks your sets, making your workout seamless. - Live Activities & Dynamic Island: Stay connected to your workout timer directly from your lock screen or Dynamic Island. A quick glance is all you need. - Customizable Notifications: Get notified with a sound or vibration the moment your rest period is over. You'll never miss a beat. Whether you're a beginner or a seasoned lifter, the Gym Rest Timer is the personal coach you've been waiting for. It's more than just a timer—it's your key to a more efficient, focused, and effective workout. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Castra App
Read full descriptionHide full description
The platform where fitness coaches seamlessly manage clients and everyone can discover motivation for free FEATURES: - Log your workout with a simple and easy to use interface - Ready to use workouts to get you started, or get a personalized AI-generated plan the moment you sign up - Hundreds of exercises in our library or create your own - Create your own custom exercises for your workouts - Follow and copy your friends workout - Analyze your workout in details with charts and graphs - Analyze your body measure progress - Lead or join your dream team of athletes, or discover and join public communities and challenges - Manage your clients workouts and track their performance - Send and track check-ins and custom forms with your clients - Find your coach that will help you achieve your dream body, and book their sessions and services directly - Share your workouts and achievements as branded images to Instagram, Facebook and beyond - Chat with your coach or clients in real time ATHLETE: - Unlimited workouts per day - Unlimited custom exercises - Unlimited Graph History - Instantly connect with coaches - Book coaching sessions and services - Join challenges and earn rewards - Support our small team COACH: - Lead your own team of athletes - Manage and organize your clients workouts - Assign and review check-ins and custom forms - Publish bookable services and manage your schedule - Chat with your clients in real time - Support our small team Th Athlete and Coach subscriptions automatically renews if you do not cancel it at least 24 hours before the end of the current subscription period. Your account will be charged for the next subscription period up to 24 hours prior to the current subscription's expiration. You can manage your subscription and disable automatic renewal at any time by adjusting your Apple account settings. You have the right to withdraw from your initial subscription within 14 days of starting it. By purchasing, you accept our Tems & Conditions and Privacy Policy. Terms & Conditions https://castra.app/terms-and-conditions/ Privacy Policy https://castra.app/privacy-policy/ Own your journey!
Screenshots
Verdict
The clearest difference is update cadence: Castra App at weekly against Restrr's every 3 months. Castra App also leads on iOS requirement (16.6 vs 18.5). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Restrr sells 3 in-app purchases, starting at $1.99 per month and Castra App sells 4 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Restrr ships an update every 3 months, Castra App weekly. The most recent releases landed on September 24, 2026 and October 22, 2026 respectively.
| Parameter | Restrr | Castra App |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 months | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Requires iOS | 18.5 | 16.6 — better |
| Further details — not scored | ||
| Size | 19 MB | 66 MB |
| Age rating | 4+ | 17+ |
| Developer | Matija Gunther | CASTRA APP OOD |
In-app purchases
Restrr
- Monthly$1.991 Month
- Annual$8.991 Year
- Lifetime$3.99
Castra App
- Athlete Subscription14 Days trial$4.991 Month
- Coach Monthly Subscription14 Days trial$29.991 Month
- Athlete Annual Subscription14 Days trial$49.991 Year
Show 1 moreShow fewer
- Coach Yearly Subscription14 Days trial$269.991 Year









