# One vs OTP

The clearest difference is in-app purchases: One at none against OTP's 1. One also leads on review sentiment (13% vs 0%). OTP's advantage is device support (4 vs 2) and iOS requirement (9.3 vs 14.0). On price, update cadence and ads there is nothing between them.

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

One ships an update every 5 months, OTP every 6 months. The most recent releases landed on September 4, 2026 and July 28, 2026 respectively.

## The numbers

| Metric | One | OTP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.6 (18 ratings)](https://appshunter.io/ios/app/otp-auth/id1436497541/reviews)** |
| Number of ratings | — | **18** |
| Positive reviews | **12.5% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 6 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 49 MB | 27 MB |
| Requires iOS | 14.0 | **9.3** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [NTT DATA GROUP CORPORATION](https://appshunter.io/developer/478236616) | [浩 王](https://appshunter.io/developer/1055265396) |

## What reviewers say

### One

[App page](https://appshunter.io/ios/app/one-time-password/id1028958661)

This utility generates a secure, eight-digit disposable password every minute. These one-time passwords are ideal for enhancing security across various online services, as they become invalid after a short period, even if compromised.

**Highlights:** Generates eight-digit passwords, Passwords valid for one minute, Enhances online service security, Disposable password functionality, Requires OTP application at service

**Features:** Vision Pro support

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is One free?

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

### Is OTP free?

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

### Do One or OTP have ads?

Neither One nor OTP shows ads.

### Which is updated more often, One or OTP?

One ships an update every 5 months, and OTP every 6 months. Most recently, One was updated on September 4, 2026 and OTP on July 28, 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.*