# Interval Timer vs Power Within

The clearest difference is ads: Power Within at none against Interval Timer's shown. Power Within also leads on update cadence (fortnightly vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Interval Timer sells 3 in-app purchases, starting at $3.99 per month and Power Within sells 2 in-app purchases, starting at $23.99 per month. Whichever you choose, the download price is not the number that matters.

Interval Timer ships an update every 2 months, Power Within fortnightly. The most recent releases landed on September 16, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Interval Timer | Power Within |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 13 MB | 124 MB |
| Requires iOS | 15.6 | **14.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Andrei Dziahel](https://appshunter.io/developer/1822996017) | [Global Fitness Holdings Ltd](https://appshunter.io/developer/1490993741) |

## What reviewers say

### Interval Timer

[App page](https://appshunter.io/ios/app/interval-timer-workout-hiit/id6756293115)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Interval Timer PRO | $3.99 | per month |
| Interval Tabata Timer | $3.99 | per 7 days |
| Interval Timer PRO | $24.99 | one-time |


### Power Within

[App page](https://appshunter.io/ios/app/power-within/id6758092049)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $23.99 | per month |
| Annual Subscription | $239.99 | per year |


## Frequently asked questions

### Is Interval Timer free?

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

### Is Power Within free?

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

### Do Interval Timer or Power Within have ads?

Interval Timer shows ads; Power Within does not.

### Which is updated more often, Interval Timer or Power Within?

Interval Timer ships an update every 2 months, and Power Within fortnightly. Most recently, Interval Timer was updated on September 16, 2026 and Power Within on September 19, 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.*