# PB Intervals vs Power Nap

The clearest difference is price: PB Intervals at Free against Power Nap's $4.99. PB Intervals also leads on iOS requirement (15.0 vs 17.0). Power Nap's advantage is in-app purchases (none vs 1) and update cadence (every 4 months vs every 15 months). On ads and device support there is nothing between them.

PB Intervals is free to download; Power Nap costs $4.99 up front. PB Intervals sells 1 one-off in-app purchase. Power Nap asks for nothing beyond the download.

PB Intervals ships an update every 15 months, Power Nap every 4 months. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | PB Intervals | Power Nap |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/pb-intervals/id6723896953/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 4 months** |
| Monetization | Free with in-app purchases | — |
| Size | 12 MB | 2 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Creative Banks Ltd](https://appshunter.io/developer/1771001473) | [Impossible X LLC](https://appshunter.io/developer/708988184) |

## What reviewers say

### PB Intervals

[App page](https://appshunter.io/ios/app/pb-intervals/id6723896953)

This app offers a high-precision interval and reaction timer designed for various workouts and training needs. It allows users to create custom sessions, randomize elements, and share their routines. Ideal for athletes, trainers, and fitness enthusiasts seeking accurate timing and dynamic training.

**Highlights:** Zero time drift for accurate timing, In-app session creator, Interval and reaction timers, Randomize workout elements, Customizable alerts and messages, Share and import workouts via CSV

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PB Interval Premium | $6.99 | one-time |


### Power Nap

[App page](https://appshunter.io/ios/app/power-nap-impossible/id6757374849)

**In-app purchases:** none


## Frequently asked questions

### Is PB Intervals free?

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

### Is Power Nap free?

Power Nap costs $4.99, with no in-app purchases.

### Do PB Intervals or Power Nap have ads?

Neither PB Intervals nor Power Nap shows ads.

### Which is updated more often, PB Intervals or Power Nap?

PB Intervals ships an update every 15 months, and Power Nap every 4 months. Most recently, PB Intervals was updated on October 24, 2026 and Power Nap on October 28, 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.*