# OTP vs Authenticator TOTP

The clearest difference is update cadence: Authenticator TOTP at fortnightly against OTP's every 6 months. OTP's advantage is iOS requirement (9.3 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. OTP sells 1 one-off in-app purchase and Authenticator TOTP sells 4 in-app purchases, starting at $3.49 per 7 days. Whichever you choose, the download price is not the number that matters.

OTP ships an update every 6 months, Authenticator TOTP fortnightly. The most recent releases landed on September 29, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | OTP | Authenticator TOTP |
| --- | --- | --- |
| 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 | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 27 MB | 15 MB |
| Requires iOS | **9.3** | 17.6 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [浩 王](https://appshunter.io/developer/1055265396) | [Boris Spiro](https://appshunter.io/developer/1853293003) |

## 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 |


### Authenticator TOTP

[App page](https://appshunter.io/ios/app/authenticator-totp/id6757983630)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $3.49 | per 7 days |
| Monthly | $7.99 | per month |
| Yearly | $49.99 | per year |
| Lifetime | $79.99 | one-time |


## Frequently asked questions

### Is OTP free?

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

### Is Authenticator TOTP free?

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

### Do OTP or Authenticator TOTP have ads?

Neither OTP nor Authenticator TOTP shows ads.

### Which is updated more often, OTP or Authenticator TOTP?

OTP ships an update every 6 months, and Authenticator TOTP fortnightly. Most recently, OTP was updated on September 29, 2026 and Authenticator TOTP on October 5, 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.*