# Interval Timer ~ HIIT & Tabata vs bluebell

The clearest difference is price: Interval Timer ~ HIIT & Tabata at Free against bluebell's $0.99. Interval Timer ~ HIIT & Tabata also leads on update cadence (every 2 days vs weekly). bluebell's advantage is ads (none vs shown). On in-app purchases, device support and iOS requirement there is nothing between them.

Interval Timer ~ HIIT & Tabata is free to download; bluebell costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Interval Timer ~ HIIT & Tabata ships an update every 2 days, bluebell weekly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Interval Timer ~ HIIT & Tabata | bluebell |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Weekly |
| Size | 9 MB | 11 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [manabu ueda](https://appshunter.io/developer/1606163236) | [亮 赵](https://appshunter.io/developer/1886021254) |

## What reviewers say

### Interval Timer ~ HIIT & Tabata

[App page](https://appshunter.io/ios/app/interval-timer-hiit-and-tabata/id6762538816)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### bluebell

[App page](https://appshunter.io/ios/app/bluebell-haptic-rhythm/id6806587727)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Interval Timer ~ HIIT & Tabata free?

Interval Timer ~ HIIT & Tabata is free to download, with no in-app purchases.

### Is bluebell free?

bluebell costs $0.99, with no in-app purchases.

### Do Interval Timer ~ HIIT & Tabata or bluebell have ads?

Interval Timer ~ HIIT & Tabata shows ads; bluebell does not.

### Which is updated more often, Interval Timer ~ HIIT & Tabata or bluebell?

Interval Timer ~ HIIT & Tabata ships an update every 2 days, and bluebell weekly. Most recently, Interval Timer ~ HIIT & Tabata was updated on November 5, 2026 and bluebell 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.*