OpenHIIT vs Ares
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OpenHIIT
This open-source interval timer app helps optimize various activities like workouts, work sprints, and study sessions. It offers customizable timing, precise controls, and clear auditory and visual alerts to keep you motivated and on track. Users can also join a collaborative community to contribute to its development.
- Customizable interval timing
- Precise and user-friendly controls
- Auditory and visual alerts
- Open-source community collaboration
- Ad-free experience
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Enhance your daily routines with OpenHIIT, the versatile open-source interval timer app. Tailored for various activities, including but not limited to High-Intensity Interval Training (HIIT), OpenHIIT is a dynamic tool designed to optimize your tasks and foster a collaborative environment. OpenHIIT is free of ads and committed to providing an experience without in-app purchases or premium versions. Customizable Timing: Set intervals tailored to your preferences, whether it's for focused workouts, work sprints, or study sessions. Adapt OpenHIIT to your needs and make the most of your time. Precise Timing and User-Friendly Controls: Enjoy seamless sessions with accurate timing and intuitive controls. OpenHIIT ensures precision in intervals, allowing you to concentrate on your activities without disruptions. Stay in sync and maintain a steady pace throughout your tasks. Auditory and Visual Alerts: Stay informed and motivated with clear audio and visual alerts. OpenHIIT provides signals and indicators, keeping you aware of time changes without the need to glance at your device constantly. Keep your momentum going and stay on track. Open Source Collaboration: Join the collaborative spirit and become part of the OpenHIIT open-source community. Contribute to the app's development, suggest improvements, and share your ideas with users from various backgrounds. Together, we can shape the evolution of interval timers for diverse activities. Download OpenHIIT now to experience the flexibility and efficiency of an open-source interval timer. Take charge of your sessions, boost your productivity, and explore the full potential of OpenHIIT in various aspects of your daily life. Note: OpenHIIT is a project led by one individual with contributions from the community. Committed to quality and alignment with platform policies, OpenHIIT respects intellectual property rights.
Ares
This app provides a customizable interval timer for various workouts like HIIT, Tabata, yoga, and stretching. It features real-time heart rate zone tracking with Apple Watch integration and allows users to create and save unlimited training sessions and workout sets. Voice cues guide users through workouts, ensuring focus remains on exercise.
- Customizable interval timer
- HIIT, Tabata, Yoga, Stretch modes
- Apple Watch control and heart rate zones
- Unlimited training session saving
- Workout set creation
- Voice and sound cues
- Training history tracking
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An interval timer for any workout, including HIIT, Tabata, yoga, and stretching. Create Training sessions in seconds and start right away. Track heart rate zones in real time with Apple Watch. Clean, modern UI. No ads, no distractions. Interval timer • Set work interval time, rest time, and number of rounds to the second • Left/Right mode for stretching, yoga, and single-side exercises Apple Watch and heart rate zones • Control your Training from your wrist • View heart rate zones during your Training • Automatically sync with Apple Health Training sessions and workout sets • Save unlimited Training sessions • Create workout sets to chain multiple Training sessions into a single plan Exercise library • Exercise library expanded regularly • Exercise names can be spoken with voice cues during Training Training history • Track your progress with a calendar view, a list, and Training details Train your way • Voice and sound cues guide you through Training, so you can focus on the workout, not the screen • Works with the screen locked • Doesn’t interrupt your music Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.eris.one/privacy-policy/
Screenshots
Verdict
The clearest difference is in-app purchases: OpenHIIT at none against Ares's 3. OpenHIIT also leads on iOS requirement (13.0 vs 18.6). Ares's advantage is ratings volume (24 vs 8). On price, rating, review sentiment and update cadence 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. Ares sells 3 in-app purchases, starting at $1.99 per month. OpenHIIT asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for OpenHIIT against 5.0 for Ares. Both are backed by a comparable volume of ratings — 8 and 24 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
OpenHIIT ships an update monthly, Ares fortnightly. The most recent releases landed on August 14, 2026 and September 21, 2026 respectively.
| Parameter | OpenHIIT | Ares |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (8 ratings) | 5.0 (24 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 8 | 24 — better |
| Update frequency | Monthly | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 13.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 26 MB | 57 MB |
| Age rating | 4+ | 4+ |
| Developer | Abigail Mabe | Krzysztof Orlowski |
Customer experience
OpenHIIT
Ares
In-app purchases
OpenHIIT
No in-app purchases
Ares
- Ares Plus$1.991 Month
- Ares Plus$9.991 Year
- Ares Plus Forever$19.99









