# One vs TOTP Authenticator

The clearest difference is review sentiment: TOTP Authenticator at 66% against One's 13%. TOTP Authenticator also leads on update cadence (every 11 days vs every 5 months) and device support (5 vs 2). One's advantage is in-app purchases (none vs 4). On price, ads and iOS requirement there is nothing between them.

Both are free to download. TOTP Authenticator sells 4 in-app purchases, starting at $5.99 per 7 days. One asks for nothing beyond the download.

One ships an update every 5 months, TOTP Authenticator every 11 days. The most recent releases landed on October 6, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | One | TOTP Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (174 ratings)](https://appshunter.io/ios/app/totp-authenticator/id1625641322/reviews)** |
| Number of ratings | — | **174** |
| Positive reviews | 12.5% of reviews | **66.2% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 11 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 49 MB | 24 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [NTT DATA GROUP CORPORATION](https://appshunter.io/developer/478236616) | [Sparrow Code LTD](https://appshunter.io/developer/1617623165) |

## 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/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 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 11 days. Most recently, One was updated on October 6, 2026 and TOTP Authenticator on October 13, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*