HIIT Timer vs Optimability
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HIIT Timer
This interval timer is designed for High Intensity Interval Training (HIIT), warm-ups, and stretches. Easily configure workout, rest, and ready times, along with the number of rounds. The app remembers your settings for future use and offers a dark mode option.
- Customizable workout and rest intervals
- Configurable number of rounds
- Pre-workout 'Get Ready' time
- Alarm notification before interval end
- Dark mode option
- Remembers previous settings
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This app is a simple timer designed for High Intensity Interval Training (HIIT). It is also suitable for warm-ups and stretches. You can easily specify the settings, opt in for the alarm three seconds prior to the end of each part and even switch to dark mode. To use this timer: 1. Tap to configure the following settings: - Get Ready time - Workout time - Rest time - Number of rounds 2. Tap to start 3. Enjoy your workout! Since the timer remembers your previous program settings, you do not need to configure them again for your next workout. Privacy Policy: https://www.vividlytec.com/privacy-policy Terms of Use: https://www.vividlytec.com/terms-of-use
Optimability
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Optimability is the app for Optimability coaching clients. It carries the day your coaches built for you: what to eat and when, the session in front of you, and the supplements and routines that go with it. See how your body is answering, read from your blood work, your gut and toxin panels, and your Apple Watch, Garmin or WHOOP. Swipe between Biology, Today and Messages. Pull down to refresh your day. Hold Home to ask the Health Architect a question. Message your coaching team and see when they have read it. Connect Apple Health in Settings to bring your sleep, heart rate, steps and workouts into your Biology tab. Optimability only reads Apple Health and never writes to it. Optimability is for enrolled clients. Your login is issued when you join.
Screenshots
Verdict
The clearest difference is ads: Optimability at none against HIIT Timer's shown. Optimability also leads on update cadence (every 4 days vs every 2 months) and iOS requirement (15.0 vs 17.6). On price, 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. Neither carries in-app purchases, so what you see is what you pay.
HIIT Timer ships an update every 2 months, Optimability every 4 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.
| Parameter | HIIT Timer | Optimability |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) — better | — |
| Positive reviews | 25.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 2 months | Every 4 days — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 9 MB | 25 MB |
| Age rating | 12+ | 12+ |
| Developer | Vividly Technologies Inc. | Optimability Performance Solutions Inc. |
In-app purchases
HIIT Timer
No in-app purchases
Optimability
No in-app purchases
