# O'der stack vs 1000digit Calc

The clearest difference is in-app purchases: 1000digit Calc at none against O'der stack's 3. 1000digit Calc also leads on update cadence (weekly vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. O'der stack sells 3 one-off in-app purchases. 1000digit Calc asks for nothing beyond the download.

O'der stack ships an update every 3 months, 1000digit Calc weekly. The most recent releases landed on September 13, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | O'der stack | 1000digit Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Size | 59 MB | 5 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ICT Fractal Inc.](https://appshunter.io/developer/473613262) | [Yukihiro Shioya](https://appshunter.io/developer/1565306192) |

## 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 |


### 1000digit Calc

[App page](https://appshunter.io/ios/app/1000digit-calc/id6463856899)

**Features:** macOS Compatibility

**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 1000digit Calc free?

1000digit Calc is free to download, with no in-app purchases.

### Do O'der stack or 1000digit Calc have ads?

Neither O'der stack nor 1000digit Calc shows ads.

### Which is updated more often, O'der stack or 1000digit Calc?

O'der stack ships an update every 3 months, and 1000digit Calc weekly. Most recently, O'der stack was updated on September 13, 2026 and 1000digit Calc on May 17, 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.*