# O'der stack vs 設計用電卓

The clearest difference is in-app purchases: 設計用電卓 at none against O'der stack's 3. 設計用電卓 also leads on update cadence (every 3 days vs every 3 months) and iOS requirement (12.0 vs 15.6). O'der stack's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. O'der stack sells 3 one-off in-app purchases. 設計用電卓 asks for nothing beyond the download.

O'der stack ships an update every 3 months, 設計用電卓 every 3 days. The most recent releases landed on September 13, 2026 and August 25, 2026 respectively.

## The numbers

| Metric | O'der stack | 設計用電卓 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 3 days** |
| Size | 59 MB | 114 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ICT Fractal Inc.](https://appshunter.io/developer/473613262) | [Kairu Inoue](https://appshunter.io/developer/1808240838) |

## What reviewers say

### O'der stack

[App page](https://appshunter.io/ios/app/oder-stack/id1449798272)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Free trial for 7 days. | Free | one-time |
| Activate for 1 month. | $0.99 | one-time |
| Activate for year. | $9.99 | one-time |


### 設計用電卓

[App page](https://appshunter.io/ios/app/id6744571094)

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

**In-app purchases:** none


## Frequently asked questions

### Is O'der stack free?

O'der stack is free to download, with in-app purchases available.

### Is 設計用電卓 free?

設計用電卓 is free to download, with no in-app purchases.

### Do O'der stack or 設計用電卓 have ads?

設計用電卓 shows ads; O'der stack does not.

### Which is updated more often, O'der stack or 設計用電卓?

O'der stack ships an update every 3 months, and 設計用電卓 every 3 days. Most recently, O'der stack was updated on September 13, 2026 and 設計用電卓 on August 25, 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.*