Scarlet vs uatu
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Scarlet
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.
- Personal issue tracker
- Local file saving
- No accounts or cloud services
- Simple task management
- Tagging for organization
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Let's face it, there are a lot of developers who like the idea of an issue tracker, but find it too much effort to use & maintain for solo, indie or hobby projects. Enter Scarlet. Scarlet is a personal issue tracker that saves to a file that you can include in your project directory, or anywhere you prefer. No accounts, no cloud services, no syncing, no third-party integration. Just a simple place to file away your project's to-dos and close them when they're complete. Add tags to an issue to help organize things, and that's it — it really couldn't be simpler.
uatu
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.
- Automatic tab synchronization
- Cross-browser compatibility
- Cross-platform support
- Cloud storage via Firebase
- Optional data encryption
- Session tracking
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Uatu is a cross-browser extension that automatically synchronizes your open tabs to the cloud. You start reading something on a mobile Safari and want to continue reading it on Google Chrome on your desktop? Uatu helps you cases where you want to keep track of all your session across all browsers and platforms. Uatu uses Google's Firebase to keep data and does not transmit it to any other service. You can encrypt all browser history by entering a passphrase.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Scarlet | uatu |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.5 (294 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 92.5% of reviews — better | 0.0% of reviews |
| Number of ratings | 294 — better | 1 |
| Update frequency | Every 3 months | Every 3 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Best chart rank | #79 — better | — |
| Devices | iPhone, iPad, iPod, Mac, Vision Pro — better | iPhone, iPad, iPod |
| Requires iOS | 14.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 3 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Steven Troughton-Smith | Gabor Albitz |
Customer experience
Scarlet
uatu
Bugs and requests
Scarlet
Reported bugs
4 issues- 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
2 requests- Auto-open last used file on startup
- Support for popular apps and mods installation
uatu
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Scarlet
- Scarlet (Full Unlock)$3.99
uatu
No in-app purchases
