# AC400 vs 2FA QR Authenticator

The clearest difference is review sentiment: 2FA QR Authenticator at 100% against AC400's 9%. 2FA QR Authenticator also leads on update cadence (every 2 weeks vs every 4 months). AC400's advantage is in-app purchases (none vs 3) and iOS requirement (12.0 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. 2FA QR Authenticator sells 3 in-app purchases, starting at $3.99 per month. AC400 asks for nothing beyond the download.

AC400 ships an update every 4 months, 2FA QR Authenticator every 2 weeks. The most recent releases landed on October 15, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | AC400 | 2FA QR Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/ac400/id1381528106/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 9.1% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 70 MB | 86 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ISIPARK IC VE DIS TICARET INSAAT ISITMA SISTEMLERI OTOMOTIV SANAYI ANONIM SIRKETI](https://appshunter.io/developer/1289067142) | [Mikhail Andrewywvich Chekalin](https://appshunter.io/developer/1802495786) |

## What reviewers say

### AC400

[App page](https://appshunter.io/ios/app/ac400/id1381528106)

Remotely manage your air conditioner's temperature from anywhere using a mobile app. Schedule daily or weekly programs, utilize location-based temperature adjustments, and view historical data. Control multiple homes and share access with family members.

**Highlights:** Remote AC temperature control, Daily/weekly scheduling, Location-based temperature adjustment, Historical temperature reports, Weather forecast integration, Multi-home control, Family sharing

**Features:** macOS Compatibility

**In-app purchases:** none


### 2FA QR Authenticator

[App page](https://appshunter.io/ios/app/2fa-qr-authenticatorauthguard/id6749512493)

Secure your online accounts with bank-level two-factor authentication codes. This app offers offline code generation, a fast QR scanner for setup, and robust encryption. It prioritizes user privacy with no tracking or ads, and offers optional iCloud sync for seamless cross-device access.

**Highlights:** Two-factor authentication (2FA, TOTP, OTP), Offline code generation, Fast QR code scanner, Bank-grade AES-256 encryption, iCloud backup & sync, Password-protected folders, Face ID / Touch ID & PIN protection

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $3.99 | per month |
| Annual Premium | $14.99 | per year |
| Lifetime Premium | $39.99 | one-time |


## Frequently asked questions

### Is AC400 free?

AC400 is free to download, with no in-app purchases.

### Is 2FA QR Authenticator free?

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

### Do AC400 or 2FA QR Authenticator have ads?

Neither AC400 nor 2FA QR Authenticator shows ads.

### Which is updated more often, AC400 or 2FA QR Authenticator?

AC400 ships an update every 4 months, and 2FA QR Authenticator every 2 weeks. Most recently, AC400 was updated on October 15, 2026 and 2FA QR Authenticator on October 12, 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.*