# OTP Auth vs One

The clearest difference is review sentiment: OTP Auth at 78% against One's 13%. OTP Auth also leads on update cadence (every 2 weeks vs every 5 months) and device support (4 vs 2). One's advantage is in-app purchases (none vs 1). On price and ads there is nothing between them.

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

OTP Auth ships an update every 2 weeks, One every 5 months. Both last shipped on October 6, 2026.

## The numbers

| Metric | OTP Auth | One |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (463 ratings)](https://appshunter.io/ios/app/otp-auth/id659877384/reviews)** | — |
| Number of ratings | **463** | — |
| Positive reviews | **77.9% of reviews** | 12.5% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 5 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 22 MB | 49 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Roland Moers](https://appshunter.io/developer/659877387) | [NTT DATA GROUP CORPORATION](https://appshunter.io/developer/478236616) |

## What reviewers say

### OTP Auth

[App page](https://appshunter.io/ios/app/otp-auth/id659877384)

Enhance your account security with two-factor authentication on your iPhone and iPad. This app supports numerous popular services and offers robust encryption for all your data. It works offline and prioritizes user privacy by not collecting or transmitting personal information.

**Highlights:** Two-factor authentication support, Encrypted iCloud Sync, Siri and Apple Watch support, Notification Center widget, Safari extension for password pasting, Face ID/Touch ID security, Encrypted backups and import/export

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OTP Auth Pro | $3.99 | one-time |

**What reviewers like**

- 🚀 Simple and effective
- 🔒 Secure with backup/restore
- 👍 Great Apple Watch support
- 👍 Intuitive and user-friendly
- 👍 Customizable icons and folders

**What reviewers complain about**

- 🐛 Occasional sync and widget issues
- 🐛 Apple Watch app needs improvements
- 🐛 Unreliable backup/restore for some users
- 🐛 Crashes and bugs reported by a few

**Reported bugs**

- Sync issues causing data loss
- Widget not displaying codes correctly
- Crashes on certain iOS versions

**Requested features**

- Larger text/font size options
- Alphabetical sorting of accounts
- Automatic account refresh/update
- Ability to edit account details


### 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


## Frequently asked questions

### Is OTP Auth free?

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

### Is One free?

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

### Do OTP Auth or One have ads?

Neither OTP Auth nor One shows ads.

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

OTP Auth ships an update every 2 weeks, and One every 5 months. Most recently, OTP Auth was updated on October 6, 2026 and One on October 6, 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.*