# DOO vs Authenticator

The clearest difference is rating: DOO at 5.0 against Authenticator's 4.5. Authenticator's advantage is update cadence (weekly vs every 2 weeks) and device support (4 vs 1). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. DOO sells 2 in-app purchases, starting at $0.99 per month and Authenticator sells 3 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

DOO holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

DOO ships an update every 2 weeks, Authenticator weekly. The most recent releases landed on September 29, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | DOO | Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/doo/id6755932181/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/authenticator-2fa-code-and-otp/id6769224166/reviews) |
| Number of ratings | 1 | **2** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 18 MB | 36 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 17+ |
| Developer | [银时(成都)科技有限公司](https://appshunter.io/developer/1834154774) | [志兵 袁](https://appshunter.io/developer/6779040430) |

## What reviewers say

### DOO

[App page](https://appshunter.io/ios/app/doo/id6755932181)

This app uses AI to convert your spoken thoughts into clear to-do items and reminders. It offers a unique single-page interface for seamless task management, integrating with iOS for a focused experience.

**Highlights:** AI-powered natural language input, Single-page interface for all tasks, Support for recurring and sub-tasks, Lunar calendar and Chinese holidays, External ICS calendar subscription, iCloud sync and backup (Pro)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DOO Pro（月度） | $0.99 | per month |
| DOO Pro（年度） | $8.99 | per year |


### Authenticator

[App page](https://appshunter.io/ios/app/authenticator-2fa-code-and-otp/id6769224166)

This app secures your online accounts with 2FA codes, a password manager, and a secure browser. It offers iCloud sync, Apple Watch support, and Face ID protection for comprehensive account security.

**Highlights:** 2FA authentication with TOTP, Password vault with local encryption, Strong password generator, Built-in secure browser, iCloud sync and cloud recovery, Apple Watch support, Face ID/password protection

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $5.99 | per 7 days |
| Yearly | $17.99 | per year |
| Lifetime | $44.99 | one-time |


## Frequently asked questions

### Is DOO free?

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

### Is Authenticator free?

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

### Which has better reviews, DOO or Authenticator?

DOO is rated higher. DOO averages 5.0 out of 5 from 1 ratings, while Authenticator averages 4.5 from 2 ratings.

### Do DOO or Authenticator have ads?

Neither DOO nor Authenticator shows ads.

### Which is updated more often, DOO or Authenticator?

DOO ships an update every 2 weeks, and Authenticator weekly. Most recently, DOO was updated on September 29, 2026 and Authenticator on October 2, 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.*