# 2FA Authenticator vs SundAi

The clearest difference is review sentiment: SundAi at 80% against 2FA Authenticator's 35%. SundAi also leads on iOS requirement (13.0 vs 15.0). 2FA Authenticator's advantage is rating (5.0 vs 4.5) and update cadence (every 6 days vs fortnightly). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. 2FA Authenticator sells 4 in-app purchases, starting at $4.99 per 7 days and SundAi sells 9 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

2FA Authenticator holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 3 and 4 respectively. Written reviews complicate that: 35% of 2FA Authenticator's written reviews are positive against 80% of SundAi's, so the app with the better star average is not the one people write more warmly about.

2FA Authenticator ships an update every 6 days, SundAi fortnightly. The most recent releases landed on September 22, 2026 and August 28, 2026 respectively.

## The numbers

| Metric | 2FA Authenticator | SundAi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/2fa-authenticator-mfaotpauth/id6503233227/reviews)** | [4.5 (4 ratings)](https://appshunter.io/ios/app/sundai-aimv/id6657961084/reviews) |
| Number of ratings | 3 | **4** |
| Positive reviews | 34.8% of reviews | **80.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Fortnightly |
| Monetization | Freemium | Free with in-app purchases |
| Size | 32 MB | 45 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [朝虹 陈](https://appshunter.io/developer/1678918725) | [Xiamen Jiashizi Network Technology Co., Ltd](https://appshunter.io/developer/1707828323) |

## What reviewers say

### 2FA Authenticator

[App page](https://appshunter.io/ios/app/2fa-authenticator-mfaotpauth/id6503233227)

This app provides robust digital security for your online accounts using end-to-end encryption. It simplifies adding accounts, securely backs up and syncs your data, and offers offline password generation. Manage all your passwords and generate strong ones with ease.

**Highlights:** Effortless account addition via QR code, Secure data backup and cross-device sync, Offline one-time password generation, Password manager for central organization, Customizable strong password generator, Face ID and Touch ID secure access

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Authenticator Weekly | $4.99 | per 7 days |
| Authenticator - Weekly | $4.99 | per 7 days |
| Authenticator Yearly | $39.99 | per year |
| Authenticator Lifetime | $39.99 | one-time |


### SundAi

[App page](https://appshunter.io/ios/app/sundai-aimv/id6657961084)

Generate original songs with AI based on your creative descriptions. This tool simplifies music creation, allowing anyone to produce unique tracks from their ideas. Start your songwriting journey effortlessly.

**Highlights:** AI song generation, Text-to-music creation, Creative inspiration input, Music production tool, Effortless songwriting

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 原创证明 | $0.99 | one-time |
| 300积分 | $9.99 | one-time |
| 500积分 | $12.99 | one-time |
| 季度会员 | $14.99 | one-time |
| 年会员 | $19.99 | one-time |
| 1000积分 | $19.99 | one-time |
| 永久会员 | $29.99 | one-time |
| 2000积分 | $29.99 | one-time |
| 5000积分 | $69.99 | one-time |


## Frequently asked questions

### Is 2FA Authenticator free?

2FA Authenticator is free to download, with in-app purchases available.

### Is SundAi free?

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

### Which has better reviews, 2FA Authenticator or SundAi?

2FA Authenticator is rated higher. 2FA Authenticator averages 5.0 out of 5 from 3 ratings, while SundAi averages 4.5 from 4 ratings.

### Do 2FA Authenticator or SundAi have ads?

Neither 2FA Authenticator nor SundAi shows ads.

### Which is updated more often, 2FA Authenticator or SundAi?

2FA Authenticator ships an update every 6 days, and SundAi fortnightly. Most recently, 2FA Authenticator was updated on September 22, 2026 and SundAi on August 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.*