# auth. vs UDevice

The clearest difference is rating: auth. at 4.7 against UDevice's 4.4. auth. also leads on device support (5 vs 3) and price ($3.99 vs $4.99). UDevice's advantage is review sentiment (78% vs 58%) and ratings volume (36 vs 6). On update cadence, ads, in-app purchases and iOS requirement there is nothing between them.

auth. costs $3.99 and UDevice $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

auth. holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: UDevice has 36 ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 58% of auth.'s written reviews are positive against 78% of UDevice's, so the app with the better star average is not the one people write more warmly about.

auth. ships an update monthly, UDevice every 3 weeks. The most recent releases landed on September 14, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | auth. | UDevice |
| --- | --- | --- |
| Price | **$3.99** | $4.99 |
| Rating | **[4.7 (6 ratings)](https://appshunter.io/ios/app/auth-2fa-smart-sync/id1553284993/reviews)** | [4.4 (36 ratings)](https://appshunter.io/ios/app/udevice-dev-assistant/id1608053878/reviews) |
| Number of ratings | 6 | **36** |
| Positive reviews | 58.3% of reviews | **78.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Paid | **Free** |
| Best chart rank | #174 | **#29** |
| Size | 28 MB | 159 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | **iPhone, iPad, Mac, Apple Watch, Vision Pro** | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [ChakMing Wong](https://appshunter.io/developer/1525986104) | [Gansu Zhenxian Network Technology Co., Ltd.](https://appshunter.io/developer/1616881226) |

## What reviewers say

### auth.

[App page](https://appshunter.io/ios/app/auth-2fa-smart-sync/id1553284993)

**Currently charting:** #174 Top Paid · Developer Tools (US App Store)

This app securely stores and manages your two-factor authentication codes in one place. It simplifies the process by allowing QR code scanning or link-based setup, ensuring your accounts remain protected.

**Highlights:** Unlimited account storage, QR code scanning, Link-based account addition, Offline running, Customizable timeout and auto-lock, Password and safe code storage

**Features:** Apple Watch app

**In-app purchases:** none


### UDevice

[App page](https://appshunter.io/ios/app/udevice-dev-assistant/id1608053878)

**Currently charting:** #29 Top Paid · Developer Tools, #196 Top Grossing · Developer Tools (US App Store)

This app offers a comprehensive suite of developer and testing tools. It includes network utilities like HTTP(s) capture and DNS parsing, alongside system information and file management capabilities. Ideal for development, testing, and device management.

**Highlights:** HTTP(s) Capture/Rewrite, SSH and Terminal access, Python3 interpreter, Cookie editing, Network utilities (Ping, DNS, Traceroute, Port Scan), File manager, Device fingerprinting and system info

**Features:** macOS Compatibility, Safari Extension, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is auth. free?

auth. costs $3.99, with no in-app purchases.

### Is UDevice free?

UDevice costs $4.99, with no in-app purchases.

### Which has better reviews, auth. or UDevice?

auth. is rated higher. auth. averages 4.7 out of 5 from 6 ratings, while UDevice averages 4.4 from 36 ratings.

### Do auth. or UDevice have ads?

Neither auth. nor UDevice shows ads.

### Which is updated more often, auth. or UDevice?

auth. ships an update monthly, and UDevice every 3 weeks. Most recently, auth. was updated on September 14, 2026 and UDevice on September 22, 2026.

### Which is more popular, auth. or UDevice?

auth. currently peaks at #174 in the App Store charts, and UDevice at #29. Chart position reflects recent download velocity rather than total install base.

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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.*