# Scarlet vs uatu

The clearest difference is review sentiment: Scarlet at 92% against uatu's 0%. Scarlet also leads on rating (4.5 vs 1.0) and ratings volume (294 vs 1). uatu's advantage is price (Free vs $2.99) and in-app purchases (none vs 1). On update cadence, ads, monetization model and iOS requirement there is nothing between them.

uatu is free to download; Scarlet costs $2.99 up front. Scarlet sells 1 one-off in-app purchase. uatu asks for nothing beyond the download.

Scarlet holds the better App Store score, 4.5 against 1.0. That said, the two scores are not equally well evidenced: Scarlet has 294 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 92% of Scarlet's written reviews are positive against 0% of uatu's.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on September 28, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Scarlet | uatu |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.5 (294 ratings)](https://appshunter.io/ios/app/scarlet/id1532669250/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/uatu/id1663590257/reviews) |
| Number of ratings | **294** | 1 |
| Positive reviews | **92.5% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free | Free |
| Best chart rank | **#79** | — |
| Size | 3 MB | 15 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac, Vision Pro** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Steven Troughton-Smith](https://appshunter.io/developer/286133549) | [Gabor Albitz](https://appshunter.io/developer/1661348626) |

## What reviewers say

### Scarlet

[App page](https://appshunter.io/ios/app/scarlet/id1532669250)

**Currently charting:** #79 Top Paid · Developer Tools (US App Store)

A personal issue tracker designed for solo developers and hobby projects. It saves data locally to a file, eliminating the need for accounts, cloud services, or syncing. Easily manage and close project tasks with simple tagging for organization.

**Highlights:** Personal issue tracker, Local file saving, No accounts or cloud services, Simple task management, Tagging for organization

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Scarlet (Full Unlock) | $3.99 | one-time |

**What reviewers like**

- 👍 Easy to set up and use
- 💾 Simple JSON-based data storage
- 🎯 Straightforward bug tracking functionality

**What reviewers complain about**

- 🐛 Critical data loss issues
- ❌ Fails to save added items
- 🚫 Limited app functionality
- ⚠️ Unreliable file persistence

**Reported bugs**

- Data loss when browsing issues
- Added items not saved after closing and reopening
- Only original items persist after multiple sessions
- Permanent data loss during normal usage

**Requested features**

- Auto-open last used file on startup
- Support for popular apps and mods installation


### uatu

[App page](https://appshunter.io/ios/app/uatu/id1663590257)

This browser extension automatically syncs your open tabs across different browsers and devices to the cloud. It allows you to seamlessly continue reading content from your mobile device to your desktop. All data is stored securely using Firebase and can be encrypted with a passphrase.

**Highlights:** Automatic tab synchronization, Cross-browser compatibility, Cross-platform support, Cloud storage via Firebase, Optional data encryption, Session tracking

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

**In-app purchases:** none


## Frequently asked questions

### Is Scarlet free?

Scarlet costs $2.99, and also offers in-app purchases.

### Is uatu free?

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

### Which has better reviews, Scarlet or uatu?

Scarlet is rated higher. Scarlet averages 4.5 out of 5 from 294 ratings, while uatu averages 1.0 from 1 ratings.

### Do Scarlet or uatu have ads?

Neither Scarlet nor uatu shows ads.

### Which is updated more often, Scarlet or uatu?

Scarlet ships an update every 3 months, and uatu every 3 months. Most recently, Scarlet was updated on September 28, 2026 and uatu on September 19, 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.*