# IntervalTimer vs AI Journal & Diary CAIRN PRO

The clearest difference is price: IntervalTimer at Free against AI Journal & Diary CAIRN PRO's $1.99. IntervalTimer also leads on update cadence (every 10 days vs every 2 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

IntervalTimer is free to download; AI Journal & Diary CAIRN PRO costs $1.99 up front. IntervalTimer sells 3 in-app purchases, starting at $1.99 per month and AI Journal & Diary CAIRN PRO sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

IntervalTimer ships an update every 10 days, AI Journal & Diary CAIRN PRO every 2 months. The most recent releases landed on October 31, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | IntervalTimer | AI Journal & Diary CAIRN PRO |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/intervaltimer-tabata-and-emom/id6758163235/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 2 months |
| Monetization | Freemium | — |
| Size | 18 MB | 5 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pinyipin Technology (Chongqing) Co., Ltd.](https://appshunter.io/developer/1842547806) | [Aneesh Pradeep](https://appshunter.io/developer/1836157821) |

## What reviewers say

### IntervalTimer

[App page](https://appshunter.io/ios/app/intervaltimer-tabata-and-emom/id6758163235)

This app provides a minimalist yet powerful interval timer for high-intensity workouts like HIIT, Tabata, and EMOM. It features professional voice guidance, customizable templates, and a clear, large display for easy readability during exercise.

**Highlights:** Professional voice guidance, 20+ built-in workout templates, Customizable interval presets, Extra-large, readable display, Three-color phase coding, Workout session tracking

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Monthly $1.99 | $1.99 | per month |
| PRO Annual $19.99 | $9.99 | per year |
| Interval Timer Pro Lifetime | $39.99 | one-time |


### AI Journal & Diary CAIRN PRO

[App page](https://appshunter.io/ios/app/ai-journal-and-diary-cairn-pro/id6778041880)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $4.99 | per month |
| Pro Annual | $29.99 | per year |
| CAIRN Pro | $69.99 | one-time |


## Frequently asked questions

### Is IntervalTimer free?

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

### Is AI Journal & Diary CAIRN PRO free?

AI Journal & Diary CAIRN PRO costs $1.99, and also offers in-app purchases.

### Do IntervalTimer or AI Journal & Diary CAIRN PRO have ads?

Neither IntervalTimer nor AI Journal & Diary CAIRN PRO shows ads.

### Which is updated more often, IntervalTimer or AI Journal & Diary CAIRN PRO?

IntervalTimer ships an update every 10 days, and AI Journal & Diary CAIRN PRO every 2 months. Most recently, IntervalTimer was updated on October 31, 2026 and AI Journal & Diary CAIRN PRO on November 10, 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.*