# AP Tape Calculator vs dapter

The clearest difference is in-app purchases: AP Tape Calculator at none against dapter's 3. AP Tape Calculator also leads on device support (3 vs 1). dapter's advantage is ads (none vs shown). On price, update cadence and iOS requirement there is nothing between them.

Both are free to download. dapter sells 3 in-app purchases, starting at $3.99 per month. AP Tape Calculator asks for nothing beyond the download.

AP Tape Calculator ships an update every 10 days, dapter every 2 weeks. The most recent releases landed on October 6, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | AP Tape Calculator | dapter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 10 days** | Every 2 weeks |
| Size | 49 MB | 65 MB |
| Requires iOS | **15.6** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ashok Patel](https://appshunter.io/developer/1894548632) | [Anuar Shaidenov](https://appshunter.io/developer/6786665450) |

## What reviewers say

### AP Tape Calculator

[App page](https://appshunter.io/ios/app/ap-tape-calculator/id6762531901)

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

**In-app purchases:** none


### dapter

[App page](https://appshunter.io/ios/app/dapter-notes-that-do-math/id6786665448)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Dapter Plus Monthly | $3.99 | per month |
| Dapter Plus Yearly | $19.99 | per year |
| Dapter Plus Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is AP Tape Calculator free?

AP Tape Calculator is free to download, with no in-app purchases.

### Is dapter free?

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

### Do AP Tape Calculator or dapter have ads?

AP Tape Calculator shows ads; dapter does not.

### Which is updated more often, AP Tape Calculator or dapter?

AP Tape Calculator ships an update every 10 days, and dapter every 2 weeks. Most recently, AP Tape Calculator was updated on October 6, 2026 and dapter on October 15, 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.*