# uSpectrum MK350S vs Dart

The clearest difference is in-app purchases: uSpectrum MK350S at none against Dart's 2. uSpectrum MK350S also leads on iOS requirement (6.0 vs 26.2). Dart's advantage is update cadence (daily vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Dart sells 2 in-app purchases, starting at $3.99 per 7 days. uSpectrum MK350S asks for nothing beyond the download.

uSpectrum MK350S ships an update every 2 months, Dart daily. The most recent releases landed on November 4, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | uSpectrum MK350S | Dart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/uspectrum-mk350s/id718838051/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Daily** |
| Monetization | Free | — |
| Size | 54 MB | 10 MB |
| Requires iOS | **6.0** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [United Power Research Technology Corporation](https://appshunter.io/developer/1501316337) | [Two Mustard Bytes](https://appshunter.io/developer/1869911881) |

## What reviewers say

### uSpectrum MK350S

[App page](https://appshunter.io/ios/app/uspectrum-mk350s/id718838051)

This app provides advanced light analysis and efficient workflow features for lighting production. It offers remote control operations, data storage, and detailed light readings including BIN ranking and CRI.

**Highlights:** WiFi remote control, SD card data storage, Basic and advanced light analytics, BIN ranking, Log compare, CRI (R1-R15)

**Features:** macOS Compatibility

**In-app purchases:** none


### Dart

[App page](https://appshunter.io/ios/app/dart-speed-reading/id6758026435)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Dart - Weekly Subscription | $3.99 | per 7 days |
| Dart - Yearly Subscription | $39.99 | per year |


## Frequently asked questions

### Is uSpectrum MK350S free?

uSpectrum MK350S is free to download, with no in-app purchases.

### Is Dart free?

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

### Do uSpectrum MK350S or Dart have ads?

Neither uSpectrum MK350S nor Dart shows ads.

### Which is updated more often, uSpectrum MK350S or Dart?

uSpectrum MK350S ships an update every 2 months, and Dart daily. Most recently, uSpectrum MK350S was updated on November 4, 2026 and Dart on October 28, 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.*