# Interval Timer vs PSLab

The clearest difference is in-app purchases: PSLab at none against Interval Timer's 3. PSLab also leads on iOS requirement (13.0 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Interval Timer sells 3 in-app purchases, starting at $4.99 per month. PSLab asks for nothing beyond the download.

Interval Timer ships an update every 3 weeks, PSLab fortnightly. The most recent releases landed on October 9, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Interval Timer | PSLab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (25 ratings)](https://appshunter.io/ios/app/interval-timer-timewave/id1524345488/reviews)** | — |
| Number of ratings | **25** | — |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | Freemium | — |
| Size | 49 MB | 32 MB |
| Requires iOS | 26.0 | **13.0** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Muhammed Sahil Arayakandy](https://appshunter.io/developer/1524345491) | [FOSSASIA](https://appshunter.io/developer/1788752366) |

## What reviewers say

### Interval Timer

[App page](https://appshunter.io/ios/app/interval-timer-timewave/id1524345488)

This versatile timer app allows users to create custom sequences for various activities, from breathwork and workouts to focus sessions and cooking. It offers AI-powered voice guidance, iCloud synchronization across Apple devices, and a minimalist black-and-white interface.

**Highlights:** Customizable timer chains, Breathwork flow builder, Intermittent fasting timers, Workout routine creator, Focus and Pomodoro timers, AI voice guidance, iCloud sync across devices

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $4.99 | per month |
| Yearly Premium | $24.99 | per year |
| Lifetime Premium | $49.99 | one-time |


### PSLab

[App page](https://appshunter.io/ios/app/pslab/id6740454978)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Interval Timer free?

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

### Is PSLab free?

PSLab is free to download, with no in-app purchases.

### Do Interval Timer or PSLab have ads?

Neither Interval Timer nor PSLab shows ads.

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

Interval Timer ships an update every 3 weeks, and PSLab fortnightly. Most recently, Interval Timer was updated on October 9, 2026 and PSLab on October 1, 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.*