# HIIT Timer vs Optimability

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.

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.

## The numbers

| Metric | HIIT Timer | Optimability |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/hiit-timer/id1574999662/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | Ad-supported | — |
| Size | 9 MB | 25 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Vividly Technologies Inc.](https://appshunter.io/developer/1574999664) | [Optimability Performance Solutions Inc.](https://appshunter.io/developer/6811428185) |

## What reviewers say

### HIIT Timer

[App page](https://appshunter.io/ios/app/hiit-timer/id1574999662)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


### Optimability

[App page](https://appshunter.io/ios/app/optimability/id6811428183)

**In-app purchases:** none


## Frequently asked questions

### Is HIIT Timer free?

HIIT Timer is free to download, with no in-app purchases.

### Is Optimability free?

Optimability is free to download, with no in-app purchases.

### Do HIIT Timer or Optimability have ads?

HIIT Timer shows ads; Optimability does not.

### Which is updated more often, HIIT Timer or Optimability?

HIIT Timer ships an update every 2 months, and Optimability every 4 days. Most recently, HIIT Timer was updated on November 3, 2026 and Optimability on October 31, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*