# OTP vs AtOnline Auth

The clearest difference is in-app purchases: AtOnline Auth at none against OTP's 1. OTP's advantage is iOS requirement (9.3 vs 13.0). On price, ads and device support there is nothing between them.

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

## The numbers

| Metric | OTP | AtOnline Auth |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (18 ratings)](https://appshunter.io/ios/app/otp-auth/id1436497541/reviews)** | — |
| Number of ratings | **18** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 27 MB | 19 MB |
| Requires iOS | **9.3** | 13.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [浩 王](https://appshunter.io/developer/1055265396) | [Karpelès Lab Inc.](https://appshunter.io/developer/1496744532) |

## 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 |


### AtOnline Auth

[App page](https://appshunter.io/ios/app/atonline-auth/id6747974636)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OTP free?

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

### Is AtOnline Auth free?

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

### Do OTP or AtOnline Auth have ads?

Neither OTP nor AtOnline Auth shows ads.

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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.*