# Workout Interval Timer vs Plank Streak

The clearest difference is update cadence: Plank Streak at every 9 days against Workout Interval Timer's every 4 months. Workout Interval Timer's advantage is iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Workout Interval Timer sells 3 in-app purchases, starting at $1.99 per month and Plank Streak sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Workout Interval Timer ships an update every 4 months, Plank Streak every 9 days. The most recent releases landed on September 18, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Workout Interval Timer | Plank Streak |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 9 days** |
| Size | 30 MB | 31 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Joaquin Arino](https://appshunter.io/developer/1781911667) | [Stronger Mobile Apps](https://appshunter.io/developer/1819741970) |

## What reviewers say

### Workout Interval Timer

[App page](https://appshunter.io/ios/app/workout-interval-timer-peak/id6738699642)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium Subscription | $1.99 | per month |
| Anual Premium Subscription | $9.90 | per year |
| Lifetime Premium | $29.99 | one-time |


### Plank Streak

[App page](https://appshunter.io/ios/app/plank-streak/id6790813791)

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Upgrade | $0.99 | per month |
| PREMIUM Subscription | $7.99 | per year |


## Frequently asked questions

### Is Workout Interval Timer free?

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

### Is Plank Streak free?

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

### Do Workout Interval Timer or Plank Streak have ads?

Neither Workout Interval Timer nor Plank Streak shows ads.

### Which is updated more often, Workout Interval Timer or Plank Streak?

Workout Interval Timer ships an update every 4 months, and Plank Streak every 9 days. Most recently, Workout Interval Timer was updated on September 18, 2026 and Plank Streak on September 13, 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.*