# Interval Timer vs TimerFlex

The clearest difference is rating: Interval Timer at 4.9 against TimerFlex's 3.0. Interval Timer also leads on ratings volume (246 vs 2) and iOS requirement (13.0 vs 26.0). TimerFlex's advantage is update cadence (weekly vs every 2 months) and review sentiment (100% vs 84%). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Interval Timer sells 1 one-off in-app purchase and TimerFlex sells 7 in-app purchases, starting at $1.49 per 7 days. Whichever you choose, the download price is not the number that matters.

Interval Timer holds the better App Store score, 4.9 against 3.0. That said, the two scores are not equally well evidenced: Interval Timer has 246 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 84% of Interval Timer's written reviews are positive against 100% of TimerFlex's, so the app with the better star average is not the one people write more warmly about.

Interval Timer ships an update every 2 months, TimerFlex weekly. The most recent releases landed on September 28, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Interval Timer | TimerFlex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (246 ratings)](https://appshunter.io/ios/app/interval-timer-hiit-workout/id1596127692/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/timerflex-wod-interval-timer/id6738749653/reviews) |
| Number of ratings | **246** | 2 |
| Positive reviews | 83.5% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 12 MB | 79 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 12+ |
| Developer | [Yosyp Hameliak](https://appshunter.io/developer/895008826) | [Plainworks Teknoloji Limited Sirketi](https://appshunter.io/developer/1782187835) |

## What reviewers say

### Interval Timer

[App page](https://appshunter.io/ios/app/interval-timer-hiit-workout/id1596127692)

This interval timer is designed for HIIT and interval training. Easily set work and rest periods, sets, and rounds to guide your workouts. It supports background operation and music playback, with an Apple Watch companion app for heart rate monitoring.

**Highlights:** Customizable work and rest periods, Set number of sets and rounds, Background operation support, Music playback compatibility, Apple Watch integration, Heart rate monitoring (Apple Watch)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


### TimerFlex

[App page](https://appshunter.io/ios/app/timerflex-wod-interval-timer/id6738749653)

This app uses AI to instantly create custom workout timers from whiteboard photos or text descriptions. It offers various pre-built formats, real-time heart rate tracking, and detailed workout history. Advanced features like Apple Watch sync and unlimited AI generation are available with a subscription.

**Highlights:** AI workout generation from photos/text, Apple Watch sync with haptic cues, Real-time heart rate and calorie tracking, 5 purpose-built workout formats (For Time, AMRAP, EMOM, Tabata, Custom), 1RM calculator, Voice coach and audio cues, Workout history and monthly stats

**Features:** Apple Watch app

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly subscription | $1.49 | per 7 days |
| TimerFlex Monthly | $3.49 | per month |
| 3 Months subscription | $8.49 | per 3 months |
| TimerFlex Annual Offer | $12.99 | per year |
| TimerFlex Annual | $24.99 | per year |
| Ad-Free | $0.99 | one-time |
| TimerFlex Lifetime | $34.99 | one-time |


## Frequently asked questions

### Is Interval Timer free?

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

### Is TimerFlex free?

TimerFlex is free to download, with in-app purchases available.

### Which has better reviews, Interval Timer or TimerFlex?

Interval Timer is rated higher. Interval Timer averages 4.9 out of 5 from 246 ratings, while TimerFlex averages 3.0 from 2 ratings.

### Do Interval Timer or TimerFlex have ads?

Both Interval Timer and TimerFlex show ads.

### Which is updated more often, Interval Timer or TimerFlex?

Interval Timer ships an update every 2 months, and TimerFlex weekly. Most recently, Interval Timer was updated on September 28, 2026 and TimerFlex on September 21, 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.*