# KOSO vs TST LED

The clearest difference is update cadence: KOSO at every 2 weeks against TST LED's every 6 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

KOSO ships an update every 2 weeks, TST LED every 6 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | KOSO | TST LED |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/koso-k-link/id1601702100/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 6 months |
| Monetization | Free | — |
| Size | 210 MB | 101 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 9+ |
| Developer | [Tong Yah Electronic Technology Co., Ltd.](https://appshunter.io/developer/1050103913) | [Foshan Lingchuang Future Information Technology Co., Ltd.](https://appshunter.io/developer/1836095920) |

## What reviewers say

### KOSO

[App page](https://appshunter.io/ios/app/koso-k-link/id1601702100)

This app connects to Koso meters via Bluetooth to retrieve trip data, providing fuel and maintenance notifications, and vehicle diagnostics. It also offers weather forecasts, gas prices, and navigation features, with optional synchronized turn-by-turn guidance on compatible vehicle dashboards.

**Highlights:** Bluetooth connection to Koso meters, Trip record storage, Fuel and maintenance notifications, Vehicle diagnosis, Weather forecast and gas price information, Navigation and routing, Virtual dashboard with real-time OBD data

**Features:** Vision Pro support

**In-app purchases:** none


### TST LED

[App page](https://appshunter.io/ios/app/tst-led/id6751237442)

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

**In-app purchases:** none


## Frequently asked questions

### Is KOSO free?

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

### Is TST LED free?

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

### Do KOSO or TST LED have ads?

Neither KOSO nor TST LED shows ads.

### Which is updated more often, KOSO or TST LED?

KOSO ships an update every 2 weeks, and TST LED every 6 months. Most recently, KOSO was updated on October 24, 2026 and TST LED on October 25, 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.*