# ZenMind Zazen Meditation Timer vs Stack

The clearest difference is in-app purchases: ZenMind Zazen Meditation Timer at none against Stack's 2. Stack's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Stack sells 2 in-app purchases, starting at $5.99 per month. ZenMind Zazen Meditation Timer asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 days. The most recent releases landed on October 31, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | ZenMind Zazen Meditation Timer | Stack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 days | Every 3 days |
| Size | 60 MB | 9 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kengo Yamamoto](https://appshunter.io/developer/1831546549) | [Henry Hinge](https://appshunter.io/developer/6784458312) |

## What reviewers say

### ZenMind Zazen Meditation Timer

[App page](https://appshunter.io/ios/app/zenmind-zazen-meditation-timer/id6762437481)

**Features:** macOS Compatibility

**In-app purchases:** none


### Stack

[App page](https://appshunter.io/ios/app/stack-supplement-tracker/id6784458310)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stack Pro | $5.99 | per month |
| Stack Pro | $39.99 | per year |


## Frequently asked questions

### Is ZenMind Zazen Meditation Timer free?

ZenMind Zazen Meditation Timer is free to download, with no in-app purchases.

### Is Stack free?

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

### Do ZenMind Zazen Meditation Timer or Stack have ads?

ZenMind Zazen Meditation Timer shows ads; Stack does not.

### Which is updated more often, ZenMind Zazen Meditation Timer or Stack?

ZenMind Zazen Meditation Timer ships an update every 3 days, and Stack every 3 days. Most recently, ZenMind Zazen Meditation Timer was updated on October 31, 2026 and Stack 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.*