# Interval Timer vs 9x

The clearest difference is in-app purchases: 9x at none against Interval Timer's 2. 9x also leads on iOS requirement (16.6 vs 18.0). Interval Timer's advantage is update cadence (every 3 weeks vs every 21 months). On price, ads and device support there is nothing between them.

Both are free to download. Interval Timer sells 2 in-app purchases, starting at $2.99 per month. 9x asks for nothing beyond the download.

Interval Timer ships an update every 3 weeks, 9x every 21 months. Both last shipped on October 3, 2026.

## The numbers

| Metric | Interval Timer | 9x |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (142 ratings)](https://appshunter.io/ios/app/interval-timer-multiple-hiit/id1598597704/reviews)** | — |
| Number of ratings | **142** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 21 months |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 95 MB |
| Requires iOS | 18.0 | **16.6** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Duleep Madusanka](https://appshunter.io/developer/1536533862) | [APN Lodge](https://appshunter.io/developer/1532261859) |

## What reviewers say

### Interval Timer

[App page](https://appshunter.io/ios/app/interval-timer-multiple-hiit/id1598597704)

Create personalized workout timers for HIIT, Tabata, and circuit training. Customize intervals, choose voice or beep cues, and run timers in the background with music. Includes a stopwatch and countdown timer for versatile fitness tracking.

**Highlights:** Custom interval timers, Voice or beep cues, Background operation, Customizable countdown, Stopwatch and countdown timer, Dark and light mode

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Interval Timer (Monthly) | $2.99 | per month |
| Interval Timer (Lifetime) | $14.99 | one-time |


### 9x

[App page](https://appshunter.io/ios/app/9x/id6502964646)

**Features:** Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Interval Timer free?

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

### Is 9x free?

9x is free to download, with no in-app purchases.

### Do Interval Timer or 9x have ads?

Neither Interval Timer nor 9x shows ads.

### Which is updated more often, Interval Timer or 9x?

Interval Timer ships an update every 3 weeks, and 9x every 21 months. Most recently, Interval Timer was updated on October 3, 2026 and 9x on October 3, 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.*