# O'der stack vs Verify Calculator

The clearest difference is ads: O'der stack at none against Verify Calculator's shown. Verify Calculator's advantage is update cadence (every 5 weeks vs every 3 months). On price, in-app purchases, 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 and Verify Calculator sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

O'der stack ships an update every 3 months, Verify Calculator every 5 weeks. The most recent releases landed on October 1, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | O'der stack | Verify Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Size | 59 MB | 15 MB |
| Requires iOS | 15.6 | **15.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [ICT Fractal Inc.](https://appshunter.io/developer/473613262) | [hiroshi mizuno](https://appshunter.io/developer/1742325047) |

## 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 |


### Verify Calculator

[App page](https://appshunter.io/ios/app/verify-calculator/id6499068707)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $5.99 | one-time |


## Frequently asked questions

### Is O'der stack free?

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

### Is Verify Calculator free?

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

### Do O'der stack or Verify Calculator have ads?

Verify Calculator shows ads; O'der stack does not.

### Which is updated more often, O'der stack or Verify Calculator?

O'der stack ships an update every 3 months, and Verify Calculator every 5 weeks. Most recently, O'der stack was updated on October 1, 2026 and Verify Calculator 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.*