# thumbzonekeyboard vs Stacked

The clearest difference is iOS requirement: thumbzonekeyboard at 18.5 against Stacked's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

thumbzonekeyboard ships an update every 6 days, Stacked every 3 days. The most recent releases landed on October 14, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | thumbzonekeyboard | Stacked |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 days | **Every 3 days** |
| Monetization | Free | — |
| Size | 9 MB | 15 MB |
| Requires iOS | **18.5** | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [JAESIK YOUN](https://appshunter.io/developer/1833834844) | [Pull Apps](https://appshunter.io/developer/1828384931) |

## What reviewers say

### thumbzonekeyboard

[App page](https://appshunter.io/ios/app/thumbzonekeyboard/id6757674245)

This keyboard app is optimized for one-thumb typing, offering customizable layouts for comfort and speed. It features a smart design that reduces finger movement and includes a built-in calculator for quick calculations without leaving the keyboard.

**Highlights:** Thumb-optimized layout, Standard, left-handed, and mirror modes, Smart vowel/consonant zoning, Reduced finger movement, Built-in calculator, No learning curve

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

**In-app purchases:** none


### Stacked

[App page](https://appshunter.io/ios/app/stacked-batch-pdf-scanner/id6761432682)

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

**In-app purchases:** none


## Frequently asked questions

### Is thumbzonekeyboard free?

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

### Is Stacked free?

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

### Do thumbzonekeyboard or Stacked have ads?

Neither thumbzonekeyboard nor Stacked shows ads.

### Which is updated more often, thumbzonekeyboard or Stacked?

thumbzonekeyboard ships an update every 6 days, and Stacked every 3 days. Most recently, thumbzonekeyboard was updated on October 14, 2026 and Stacked on October 11, 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.*