# One vs TOTP Authenticator

The clearest difference is in-app purchases: One at none against TOTP Authenticator's 2. One also leads on iOS requirement (14.0 vs 17.0). TOTP Authenticator's advantage is review sentiment (36% vs 13%). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. TOTP Authenticator sells 2 one-off in-app purchases. One asks for nothing beyond the download.

One ships an update every 5 months, TOTP Authenticator every 2 months. The most recent releases landed on October 6, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | One | TOTP Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (3.9K ratings)](https://appshunter.io/ios/app/totp-authenticator-fast-2fa/id1404230533/reviews)** |
| Number of ratings | — | **3.9K** |
| Positive reviews | 12.5% of reviews | **36.1% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 49 MB | 24 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [NTT DATA GROUP CORPORATION](https://appshunter.io/developer/478236616) | [AppyFactor](https://appshunter.io/developer/1404230532) |

## 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


### TOTP Authenticator

[App page](https://appshunter.io/ios/app/totp-authenticator-fast-2fa/id1404230533)

Enhance your online security with this app that generates one-time tokens for two-factor authentication. Protect your accounts from hackers by easily adding 2FA to your online services. Supports cloud sync and a Chrome extension for seamless desktop integration.

**Highlights:** Cloud Sync for backup, Chrome Extension for desktop, Dark and light theme support, Multi-platform and multi-device sync, Unlimited account support, Home screen widgets, Biometric app lock

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TOTP Premium Features | $5.99 | one-time |
| TOTP Default Product | $5.99 | one-time |

**What reviewers like**

- 👍 Solid free basic experience
- 🚀 Simple and effective
- 👍 Easy to use and set up new accounts
- 🚀 Chrome extension is cool
- 🔒 Excellent app for 2FA

**What reviewers complain about**

- 🐛 No export functionality
- 🐛 Impossible to recover account without paying
- 🐛 Can't save Authy keys from sites
- 🐛 Codes expire too fast
- 🐛 Doesn't work with some services

**Reported bugs**

- Codes not working, invalid or expired
- Sync issues, lost codes
- Doesn't work with some services
- Login screen freezes
- Incompatible with older devices

**Requested features**

- Increase font size of codes
- Add folder/tree organization for keys
- Implement Face ID support
- Add dark mode theme
- Allow pushing multiple codes to Chrome extension at once


## Frequently asked questions

### Is One free?

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

### Is TOTP Authenticator free?

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

### Do One or TOTP Authenticator have ads?

Neither One nor TOTP Authenticator shows ads.

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

One ships an update every 5 months, and TOTP Authenticator every 2 months. Most recently, One was updated on October 6, 2026 and TOTP Authenticator on October 16, 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.*