# TimerFlex vs Interval

The clearest difference is ads: Interval at none against TimerFlex's shown. Interval also leads on iOS requirement (17.0 vs 26.0). On price, update cadence, in-app purchases and device support there is nothing between them.

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

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on September 21, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | TimerFlex | Interval |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/timerflex-wod-interval-timer/id6738749653/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Weekly | Weekly |
| Monetization | Free with in-app purchases | — |
| Size | 79 MB | 38 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, Apple Watch |
| Age rating | 12+ | 4+ |
| Developer | [Plainworks Teknoloji Limited Sirketi](https://appshunter.io/developer/1782187835) | [OLEG KLIMAKOV](https://appshunter.io/developer/1702248098) |

## What reviewers say

### 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 |


### Interval

[App page](https://appshunter.io/ios/app/interval-hiit-and-tabata-timer/id6780563425)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Interval Pro | $6.99 | one-time |


## Frequently asked questions

### Is TimerFlex free?

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

### Is Interval free?

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

### Do TimerFlex or Interval have ads?

TimerFlex shows ads; Interval does not.

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

TimerFlex ships an update weekly, and Interval weekly. Most recently, TimerFlex was updated on September 21, 2026 and Interval on September 30, 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.*