# Eul vs auth.

The clearest difference is price: Eul at Free against auth.'s $3.99. Eul also leads on review sentiment (92% vs 58%) and update cadence (every 2 weeks vs monthly). auth.'s advantage is in-app purchases (none vs 1) and chart position (#180 vs unranked). On rating, ratings volume, ads and iOS requirement there is nothing between them.

Eul is free to download; auth. costs $3.99 up front. Eul sells 1 one-off in-app purchase. auth. asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.8 for Eul against 4.7 for auth.. Both are backed by a comparable volume of ratings — 4 and 6 respectively. Written reviews are what separate them: 92% of Eul's written reviews are positive against 58% of auth.'s.

Eul ships an update every 2 weeks, auth. monthly. The most recent releases landed on October 14, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Eul | auth. |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/eul-swiftui/id1541991958/reviews)** | [4.7 (6 ratings)](https://appshunter.io/ios/app/auth-2fa-smart-sync/id1553284993/reviews) |
| Number of ratings | 4 | **6** |
| Positive reviews | **92.3% of reviews** | 58.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Monthly |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | — | **#180** |
| Size | 9 MB | 38 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone, iPad, Mac | **iPhone, iPad, Mac, Apple Watch, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [科 曾](https://appshunter.io/developer/1322330151) | [ChakMing Wong](https://appshunter.io/developer/1525986104) |

## What reviewers say

### Eul

[App page](https://appshunter.io/ios/app/eul-swiftui/id1541991958)

This app offers an interactive SwiftUI learning experience with real-time code previews on Apple devices. It covers the latest SwiftUI features and serves as a comprehensive reference tool for developers.

**Highlights:** Interactive SwiftUI learning, Real-time code previews, Covers latest SwiftUI updates, Comprehensive reference tool, Cross-platform support (iOS, iPadOS, macOS), Powerful search functionality

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $1.99 | one-time |


### auth.

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

**Currently charting:** #180 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


## Frequently asked questions

### Is Eul free?

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

### Is auth. free?

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

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

Eul is rated higher. Eul averages 4.8 out of 5 from 4 ratings, while auth. averages 4.7 from 6 ratings.

### Do Eul or auth. have ads?

Neither Eul nor auth. shows ads.

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

Eul ships an update every 2 weeks, and auth. monthly. Most recently, Eul was updated on October 14, 2026 and auth. on October 1, 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.*