# STS TESSmobile vs Flash Tree

The clearest difference is rating: STS TESSmobile at 5.0 against Flash Tree's 4.0. STS TESSmobile also leads on in-app purchases (none vs 1). Flash Tree's advantage is update cadence (every 10 days vs every 4 months) and iOS requirement (11.0 vs 15.0). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Flash Tree sells 1 in-app purchase, starting at $9.99 per month. STS TESSmobile asks for nothing beyond the download.

STS TESSmobile holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 4 respectively.

STS TESSmobile ships an update every 4 months, Flash Tree every 10 days. The most recent releases landed on June 1, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | STS TESSmobile | Flash Tree |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/sts-tessmobile/id1470671505/reviews)** | [4.0 (4 ratings)](https://appshunter.io/ios/app/flash-tree/id1591487632/reviews) |
| Number of ratings | 2 | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 10 days** |
| Monetization | **Free** | Freemium |
| Size | 14 MB | 30 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Superior Traffic Services, LLC](https://appshunter.io/developer/1470671504) | [BUILDMYPAGE, LLC](https://appshunter.io/developer/1550205663) |

## What reviewers say

### STS TESSmobile

[App page](https://appshunter.io/ios/app/sts-tessmobile/id1470671505)

Monitor and control traffic light systems remotely. View real-time traffic signal status and adjust configurations for efficient traffic management.

**Highlights:** View traffic light status, Manage traffic light configuration, Remote monitoring, Real-time data

**Features:** macOS Compatibility

**In-app purchases:** none


### Flash Tree

[App page](https://appshunter.io/ios/app/flash-tree/id1591487632)

Synchronize countdown timers across multiple devices for group races or events. Start races instantly without needing external assistance. Ideal for competitive activities where precise timing is crucial.

**Highlights:** Synced countdown timers, Group race functionality, Start races instantly, Multi-device synchronization, Customizable countdowns

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Flash Tree Subscription | $9.99 | per month |


## Frequently asked questions

### Is STS TESSmobile free?

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

### Is Flash Tree free?

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

### Which has better reviews, STS TESSmobile or Flash Tree?

STS TESSmobile is rated higher. STS TESSmobile averages 5.0 out of 5 from 2 ratings, while Flash Tree averages 4.0 from 4 ratings.

### Do STS TESSmobile or Flash Tree have ads?

Neither STS TESSmobile nor Flash Tree shows ads.

### Which is updated more often, STS TESSmobile or Flash Tree?

STS TESSmobile ships an update every 4 months, and Flash Tree every 10 days. Most recently, STS TESSmobile was updated on June 1, 2026 and Flash Tree on June 4, 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.*