# Interval Exercise Timer ™ vs 20

The clearest difference is in-app purchases: 20 at none against Interval Exercise Timer ™'s 5. 20 also leads on ads (none vs shown) and update cadence (every 2 days vs monthly). Interval Exercise Timer ™'s advantage is iOS requirement (15.0 vs 26.0). On price and device support there is nothing between them.

Both are free to download. Interval Exercise Timer ™ sells 5 in-app purchases, starting at $0.99 per 7 days. 20 asks for nothing beyond the download.

Interval Exercise Timer ™ ships an update monthly, 20 every 2 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Interval Exercise Timer ™ | 20 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (23 ratings)](https://appshunter.io/ios/app/interval-exercise-timer/id6463520684/reviews)** | — |
| Number of ratings | **23** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 14 MB | 15 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Andy Sutanto](https://appshunter.io/developer/1659282966) | [Yan Yin Yu](https://appshunter.io/developer/6794815912) |

## What reviewers say

### Interval Exercise Timer ™

[App page](https://appshunter.io/ios/app/interval-exercise-timer/id6463520684)

Optimize your exercise routines with a customizable interval timer. Set precise 'Prepare,' 'Work,' and 'Rest' durations, and manage multiple sets and rounds for efficient workouts. Save your custom settings for easy access to consistent training.

**Highlights:** Customizable Prepare, Work, and Rest timers, Multi-round and set options, Real-time progress tracking, Save and load custom timer settings, User-friendly interface

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Workout Timer Pro | $0.99 | per 7 days |
| Workout Timer Pro | $1.49 | per month |
| Exercise Timer Pro | $6.99 | per 6 months |
| Tabata Timer Pro | $19.99 | per year |
| Interval Timer Pro | $39.99 | one-time |


### 20

[App page](https://appshunter.io/ios/app/20-20-20-eyecare/id6794815910)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Interval Exercise Timer ™ free?

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

### Is 20 free?

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

### Do Interval Exercise Timer ™ or 20 have ads?

Interval Exercise Timer ™ shows ads; 20 does not.

### Which is updated more often, Interval Exercise Timer ™ or 20?

Interval Exercise Timer ™ ships an update monthly, and 20 every 2 days. Most recently, Interval Exercise Timer ™ was updated on November 3, 2026 and 20 on October 31, 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.*