# UltraSync Blue Slate vs ColourTemp

The clearest difference is in-app purchases: UltraSync Blue Slate at none against ColourTemp's 2. UltraSync Blue Slate also leads on rating (3.3 vs 3.0) and device support (3 vs 1). ColourTemp's advantage is update cadence (every 10 days vs every 13 months). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. ColourTemp sells 2 in-app purchases, starting at $9.99 per year. UltraSync Blue Slate asks for nothing beyond the download.

UltraSync Blue Slate holds the better App Store score, 3.3 against 3.0. Both are backed by a comparable volume of ratings — 4 and 4 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

UltraSync Blue Slate ships an update every 13 months, ColourTemp every 10 days. The most recent releases landed on October 23, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | UltraSync Blue Slate | ColourTemp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (4 ratings)](https://appshunter.io/ios/app/ultrasync-blue-slate/id1441461069/reviews)** | [3.0 (4 ratings)](https://appshunter.io/ios/app/colourtemp/id6776435214/reviews) |
| Number of ratings | 4 | 4 |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 10 days** |
| Monetization | **Free** | Subscription |
| Size | 2 MB | 2 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Atomos Ltd.](https://appshunter.io/developer/1468547360) | [High Water Films Limited](https://appshunter.io/developer/6776435576) |

## What reviewers say

### UltraSync Blue Slate

[App page](https://appshunter.io/ios/app/ultrasync-blue-slate/id1441461069)

This app functions as a digital slate for multicamera film and video production. It syncs sound and pictures or multiple video sources for efficient editing. Use it with compatible hardware to turn your device into a wireless digislate for professional shoots.

**Highlights:** Frame-accurate timecode transmission, Wireless Bluetooth sync, Full-screen slate display, Customizable edit titles, Supports regular and drop-frame timecode

**Features:** macOS Compatibility

**In-app purchases:** none


### ColourTemp

[App page](https://appshunter.io/ios/app/colourtemp/id6776435214)

This tool measures light sources in Kelvin and detects mains-frequency flicker, helping videographers ensure consistent color temperature and avoid post-production issues. It also calculates banding risk and allows for freezing readings to compare fixtures.

**Highlights:** Color temperature measurement (2500K-9900K), Mains frequency flicker detection (50Hz/60Hz), PWM dimming detection, Banding risk calculator, Freeze and compare readings, Device calibration for consistency

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ColourTemp Annual | $9.99 | per year |
| Lifetime access | $19.99 | one-time |


## Frequently asked questions

### Is UltraSync Blue Slate free?

UltraSync Blue Slate is free to download, with no in-app purchases.

### Is ColourTemp free?

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

### Which has better reviews, UltraSync Blue Slate or ColourTemp?

UltraSync Blue Slate is rated higher. UltraSync Blue Slate averages 3.3 out of 5 from 4 ratings, while ColourTemp averages 3.0 from 4 ratings.

### Do UltraSync Blue Slate or ColourTemp have ads?

Neither UltraSync Blue Slate nor ColourTemp shows ads.

### Which is updated more often, UltraSync Blue Slate or ColourTemp?

UltraSync Blue Slate ships an update every 13 months, and ColourTemp every 10 days. Most recently, UltraSync Blue Slate was updated on October 23, 2026 and ColourTemp on October 12, 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.*