# SINCON BLUE vs Duo Auty 2FA

The clearest difference is in-app purchases: SINCON BLUE at none against Duo Auty 2FA's 2. SINCON BLUE also leads on update cadence (every 2 months vs every 8 months) and iOS requirement (11.0 vs 14.0). On price, ads and device support there is nothing between them.

Both are free to download. Duo Auty 2FA sells 2 in-app purchases, starting at $9.99 per month. SINCON BLUE asks for nothing beyond the download.

SINCON BLUE ships an update every 2 months, Duo Auty 2FA every 8 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SINCON BLUE | Duo Auty 2FA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/duo-auty-2fa-secure-pass/id6480926410/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 8 months |
| Monetization | — | Subscription |
| Size | 9 MB | 50 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | +17 |
| Developer | [国强 张](https://appshunter.io/developer/1151273698) | [Gurman Galychina LLC](https://appshunter.io/developer/1450092250) |

## What reviewers say

### SINCON BLUE

[App page](https://appshunter.io/ios/app/sincon-blue-one/id1454342954)

**Features:** macOS Compatibility

**In-app purchases:** none


### Duo Auty 2FA

[App page](https://appshunter.io/ios/app/duo-auty-2fa-secure-pass/id6480926410)

Enhance your online security with this two-factor authentication app. It supports time-based one-time passwords (TOTP) and PUSH authentication for seamless and secure access to your accounts. Add multiple accounts, customize with brand icons, and unlock with biometrics.

**Highlights:** Two-factor authentication (2FA), TOTP and PUSH authentication, QR code scanning and import, Manual code entry, Brand icon customization, Biometrics integration

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly with trial | $9.99 | per month |
| Yearly plan with trial | $59.99 | per year |


## Frequently asked questions

### Is SINCON BLUE free?

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

### Is Duo Auty 2FA free?

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

### Do SINCON BLUE or Duo Auty 2FA have ads?

Neither SINCON BLUE nor Duo Auty 2FA shows ads.

### Which is updated more often, SINCON BLUE or Duo Auty 2FA?

SINCON BLUE ships an update every 2 months, and Duo Auty 2FA every 8 months. Most recently, SINCON BLUE was updated on October 29, 2026 and Duo Auty 2FA on October 24, 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.*