# Not Another Twin Calculator vs 截记 SnapMark

The clearest difference is update cadence: 截记 SnapMark at every 2 days against Not Another Twin Calculator's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

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

Not Another Twin Calculator ships an update every 2 months, 截记 SnapMark every 2 days. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Not Another Twin Calculator | 截记 SnapMark |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Size | 10 MB | 1 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Andy Arevalo](https://appshunter.io/developer/1853674132) | [健全 刘](https://appshunter.io/developer/1889120741) |

## What reviewers say

### Not Another Twin Calculator

[App page](https://appshunter.io/ios/app/not-another-twin-calculator/id6755574828)

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

**In-app purchases:** none


### 截记 SnapMark

[App page](https://appshunter.io/ios/app/snapmark/id6764744014)

**In-app purchases:** none


## Frequently asked questions

### Is Not Another Twin Calculator free?

Not Another Twin Calculator is free to download, with no in-app purchases.

### Is 截记 SnapMark free?

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

### Do Not Another Twin Calculator or 截记 SnapMark have ads?

Neither Not Another Twin Calculator nor 截记 SnapMark shows ads.

### Which is updated more often, Not Another Twin Calculator or 截记 SnapMark?

Not Another Twin Calculator ships an update every 2 months, and 截记 SnapMark every 2 days. Most recently, Not Another Twin Calculator was updated on October 30, 2026 and 截记 SnapMark on October 28, 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.*