# ZapTodo vs Stack

The clearest difference is update cadence: ZapTodo at every 2 days against Stack's every 8 days. ZapTodo also leads on iOS requirement (14.0 vs 16.4). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. ZapTodo sells 3 in-app purchases, starting at $1.99 per 7 days and Stack sells 2 in-app purchases, starting at $1.49 per month. Whichever you choose, the download price is not the number that matters.

ZapTodo ships an update every 2 days, Stack every 8 days. The most recent releases landed on October 16, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | ZapTodo | Stack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 8 days |
| Size | 85 MB | 59 MB |
| Requires iOS | **14.0** | 16.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Yusof Feroz Yusof Ahmed Khan](https://appshunter.io/developer/1824808218) | [Fadi Zaid](https://appshunter.io/developer/1893682112) |

## What reviewers say

### ZapTodo

[App page](https://appshunter.io/ios/app/zaptodo-to-do-list-and-planner/id6748696965)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $1.99 | per 7 days |
| Premium Monthly | $2.99 | per month |
| Premium Yearly | $24.99 | per year |


### Stack

[App page](https://appshunter.io/ios/app/stack-tasks-and-reminders/id6762291589)

**Features:** Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $1.49 | per month |
| Yearly Premium | $14.99 | per year |


## Frequently asked questions

### Is ZapTodo free?

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

### Is Stack free?

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

### Do ZapTodo or Stack have ads?

Neither ZapTodo nor Stack shows ads.

### Which is updated more often, ZapTodo or Stack?

ZapTodo ships an update every 2 days, and Stack every 8 days. Most recently, ZapTodo was updated on October 16, 2026 and Stack on October 7, 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.*