# OTP vs TOTP Authenticator

The clearest difference is review sentiment: TOTP Authenticator at 65% against OTP's 0%. TOTP Authenticator also leads on rating (4.8 vs 3.6) and update cadence (every 9 days vs every 6 months). OTP's advantage is iOS requirement (9.3 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. OTP sells 1 one-off in-app purchase and TOTP Authenticator sells 4 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

TOTP Authenticator holds the better App Store score, 4.8 against 3.6. That said, the two scores are not equally well evidenced: TOTP Authenticator has 167 ratings behind it against 18, so its average is the more settled of the two. Written reviews point the same way: 0% of OTP's written reviews are positive against 65% of TOTP Authenticator's.

OTP ships an update every 6 months, TOTP Authenticator every 9 days. The most recent releases landed on July 28, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | OTP | TOTP Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (18 ratings)](https://appshunter.io/ios/app/otp-auth/id1436497541/reviews) | **[4.8 (167 ratings)](https://appshunter.io/ios/app/totp-authenticator/id1625641322/reviews)** |
| Number of ratings | 18 | **167** |
| Positive reviews | 0.0% of reviews | **65.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 9 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 27 MB | 24 MB |
| Requires iOS | **9.3** | 15.0 |
| Devices | iPhone, iPad, iPod, Apple Watch | **iPhone, iPad, iPod, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [浩 王](https://appshunter.io/developer/1055265396) | [Sparrow Code LTD](https://appshunter.io/developer/1617623165) |

## 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 |


### TOTP Authenticator

[App page](https://appshunter.io/ios/app/totp-authenticator/id1625641322)

This app generates time-based one-time passwords (TOTP) for enhanced account security. It supports two-factor authentication (2FA) by providing 6-digit codes required by many websites and services for login. The app includes extensive tutorials to guide users through setting up 2FA with various platforms.

**Highlights:** Generates 6-digit TOTP codes, Supports two-factor authentication (2FA), QR code scanning for setup, Manual secret key entry, Over 100 step-by-step setup tutorials, Privacy focused

**Features:** Apple Watch app

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TOTP OTP Codes (1 week) | $5.99 | per 7 days |
| TOTP OTP Codes (1 month) | $9.99 | per month |
| TOTP OTP Codes (1 year) | $59.99 | per year |
| Unlimited TOTP OTP Codes | $79.99 | one-time |


## Frequently asked questions

### Is OTP free?

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

### Is TOTP Authenticator free?

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

### Which has better reviews, OTP or TOTP Authenticator?

TOTP Authenticator is rated higher. OTP averages 3.6 out of 5 from 18 ratings, while TOTP Authenticator averages 4.8 from 167 ratings.

### Do OTP or TOTP Authenticator have ads?

Neither OTP nor TOTP Authenticator shows ads.

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

OTP ships an update every 6 months, and TOTP Authenticator every 9 days. Most recently, OTP was updated on July 28, 2026 and TOTP Authenticator on September 22, 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.*