# OTP vs Screen Test

The clearest difference is in-app purchases: Screen Test at none against OTP's 1. OTP's advantage is ads (none vs shown) and device support (4 vs 1). On price and update cadence there is nothing between them.

Both are free to download. OTP sells 1 one-off in-app purchase. Screen Test asks for nothing beyond the download.

OTP ships an update every 6 months, Screen Test every 4 months. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | OTP | Screen Test |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (19 ratings)](https://appshunter.io/ios/app/otp-auth/id1436497541/reviews)** | — |
| Number of ratings | **19** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 4 months** |
| Monetization | Free with in-app purchases | — |
| Size | 27 MB | 10 MB |
| Requires iOS | **9.3** | 16.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [浩 王](https://appshunter.io/developer/1055265396) | [Yunus Gunduz](https://appshunter.io/developer/1694137492) |

## What reviewers say

### OTP

[App page](https://appshunter.io/ios/app/otp-auth/id1436497541)

This app generates secure one-time passwords for two-factor authentication on your device. It supports various protocols, allows easy account setup via QR codes or manual entry, and offers robust security features like biometric locks and encrypted backups.

**Highlights:** TOTP & HOTP code generation, QR code scanning for setup, Biometric app lock (Face ID/Touch ID), Encrypted data export/import, Account grouping and organization, Dark Mode support, iCloud sync and backup

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OTPAuth Premium | $1.99 | one-time |


### Screen Test

[App page](https://appshunter.io/ios/app/screen-test-dead-pixel-check/id6759452371)

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

**In-app purchases:** none


## Frequently asked questions

### Is OTP free?

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

### Is Screen Test free?

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

### Do OTP or Screen Test have ads?

Screen Test shows ads; OTP does not.

### Which is updated more often, OTP or Screen Test?

OTP ships an update every 6 months, and Screen Test every 4 months. Most recently, OTP was updated on October 24, 2026 and Screen Test on October 21, 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.*