# Open2FA vs Prism Tape Calculator

The clearest difference is device support: Open2FA at 4 against Prism Tape Calculator's 1. Open2FA also leads on iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

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

## The numbers

| Metric | Open2FA | Prism Tape Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/prism-tape-calculator/id6802276077/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Monetization | — | Free |
| Size | 11 MB | 1 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Uladzislau Vrubleuski](https://appshunter.io/developer/1741366888) | [George Field](https://appshunter.io/developer/1828914617) |

## What reviewers say

### Open2FA

[App page](https://appshunter.io/ios/app/open2fa/id6497407368)

**In-app purchases:** none


### Prism Tape Calculator

[App page](https://appshunter.io/ios/app/prism-tape-calculator/id6802276077)

This app provides a calculator with a paper tape feature, displaying each calculation line above the keys. It offers live result previews, the ability to reuse previous results, and handles complex math with precision. It is designed for privacy with no ads or tracking.

**Highlights:** Persistent paper tape for calculations, Live result previews as you type, Tap previous results to reuse, Full expression visible on screen, Decimal arithmetic for precise math, Scientific functions available

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

**In-app purchases:** none


## Frequently asked questions

### Is Open2FA free?

Open2FA is free to download, with no in-app purchases.

### Is Prism Tape Calculator free?

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

### Do Open2FA or Prism Tape Calculator have ads?

Neither Open2FA nor Prism Tape Calculator shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*