# Interval Timer □ HIIT Timer vs Polysthenics

Interval Timer □ HIIT Timer and Polysthenics both sit at 4.8 stars, but that hides the real split: 100% of Polysthenics's written reviews are positive against 61% of Interval Timer □ HIIT Timer's. Polysthenics also leads on in-app purchases (none vs 5). Interval Timer □ HIIT Timer's advantage is ads (none vs shown) and ratings volume (88K vs 1). On price, rating, update cadence and device support there is nothing between them.

Both are free to download. Interval Timer □ HIIT Timer sells 5 in-app purchases, starting at $1.99 per month. Polysthenics asks for nothing beyond the download.

Polysthenics holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Interval Timer □ HIIT Timer has 88K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 61% of Interval Timer □ HIIT Timer's written reviews are positive against 100% of Polysthenics's.

Interval Timer □ HIIT Timer ships an update every 5 weeks, Polysthenics monthly. The most recent releases landed on November 14, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Interval Timer □ HIIT Timer | Polysthenics |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (88K ratings)](https://appshunter.io/ios/app/interval-timer-hiit-timer/id1124297113/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/polysthenics/id6476512037/reviews)** |
| Number of ratings | **88K** | 1 |
| Positive reviews | 60.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Monthly** |
| Monetization | Freemium | **Ad-supported** |
| Size | 21 MB | 155 MB |
| Requires iOS | 15.6 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Float Tech, LLC](https://appshunter.io/developer/483697886) | [Polysthenics LLC](https://appshunter.io/developer/1726948651) |

## What reviewers say

### Interval Timer □ HIIT Timer

[App page](https://appshunter.io/ios/app/interval-timer-hiit-timer/id1124297113)

Easily set up custom workout intervals with a simple drag-and-tap interface. This app provides audio cues and detailed history to track your fitness progress, even while listening to music.

**Highlights:** Customizable intervals, Drag-and-tap interface, Voice and beep guides, Background audio support, Detailed workout history, Repeat previous workouts

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Pass | $1.99 | per month |
| Premium Pass | $2.99 | per month |
| Lifetime Pass | $14.99 | one-time |
| Lifetime Pass | $19.99 | one-time |
| Premium Forever Promo | $29.99 | one-time |

**What reviewers like**

- 🚀 Simple and easy to use
- 👍 Customizable settings
- 🚀 Intuitive interface
- 🚀 Effective for HIIT workouts
- 👍 Helpful voice prompts

**What reviewers complain about**

- 🔒 Requires subscription after limited free use
- 🐛 Music volume issues with voice prompts
- 🐛 Inconsistent behavior when switching apps
- 🐛 Lack of final workout notification

**Reported bugs**

- Timer not always accurate
- Favorites/saved workouts feature not working
- Inconsistent behavior when pausing/resuming

**Requested features**

- Ability to save and name custom workouts
- More flexibility in exercise/rest time settings
- Option to adjust volume of voice prompts


### Polysthenics

[App page](https://appshunter.io/ios/app/polysthenics/id6476512037)

Easily plan and schedule your fitness classes directly from your mobile device. View class schedules, sign up for sessions, and access studio location details. Optimize your time and enjoy the convenience of managing your fitness activities on the go.

**Highlights:** View class schedules, Sign up for classes, Access studio location, Optimize time management, Convenient mobile access

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Interval Timer □ HIIT Timer free?

Interval Timer □ HIIT Timer is free to download, with in-app purchases available.

### Is Polysthenics free?

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

### Which has better reviews, Interval Timer □ HIIT Timer or Polysthenics?

Polysthenics is rated higher. Interval Timer □ HIIT Timer averages 4.8 out of 5 from 88K ratings, while Polysthenics averages 5.0 from 1 ratings.

### Do Interval Timer □ HIIT Timer or Polysthenics have ads?

Polysthenics shows ads; Interval Timer □ HIIT Timer does not.

### Which is updated more often, Interval Timer □ HIIT Timer or Polysthenics?

Interval Timer □ HIIT Timer ships an update every 5 weeks, and Polysthenics monthly. Most recently, Interval Timer □ HIIT Timer was updated on November 14, 2026 and Polysthenics on November 4, 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.*