UltraSync Blue Slate vs ColourTemp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
UltraSync Blue Slate
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.
- Frame-accurate timecode transmission
- Wireless Bluetooth sync
- Full-screen slate display
- Customizable edit titles
- Supports regular and drop-frame timecode
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The UltraSync BLUE Slate is a companion to the UltraSync BLUE (a timecode-over-bluetooth multicamera sync product from Timecode Systems). Please visit timecodesystems.com to find out more about our hardware solutions. Filming with multiple cameras and sound? Use the UltraSync BLUE Slate to sync sound and pictures, or multiple video sources, for a simple, quick, and efficient multicamera edit. UltraSync BLUE Slate is a free digital slate / clapperboard app for use in film and video production. Use the UltraSync BLUE Slate app in conjunction with a Timecode Systems UltraSync BLUE to turn your iPad or iPhone into an highly accurate, wireless digislate. This adds a professional touch to any multi camera film or video shoot, whether you're filming for TV, film, music videos, interviews or social media content. Features - Frame-accurate timecode transmits directly and wirelessly over Bluetooth from the UltraSync BLUE attached to the camera or sound recording device. There is no need for you to enter this data manually. - The display is a whole screen slate for an easier sync even when used on smaller devices. - Supports regular and drop-frame timecode. - Edit titles to customise what is displayed on your slate. For more information: https://www.timecodesystems.com
ColourTemp
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.
- 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
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ColourTemp is a colour temperature and flicker detection tool built for working videographers, DPs, cinematographers and gaffers. Point the camera at any light source for an instant Kelvin reading. Switch to flicker mode to detect mains-frequency flicker before it becomes a post problem. COLOUR TEMPERATURE Measure light from 2500K candlelight to 9900K open sky. White balance is locked to a fixed 5600K reference for consistent, repeatable readings across a shoot. Readings are close approximations — a fast, practical guide for the set, not a replacement for a calibrated colorimeter. FLICKER DETECTION Uses 240fps camera sampling and FFT analysis to detect 50Hz and 60Hz mains flicker and harmonics. Also flags PWM dimming on LED fixtures that conventional measurement misses. BANDING RISK CALCULATOR Set your project frame rate and shutter speed. ColourTemp calculates instantly whether your current combination will produce banding — and can snap to a safe setting automatically. FREEZE & COMPARE Pause a reading to lock a reference. Adjust frame rate and shutter speed while the measurement stays frozen — ideal for comparing multiple fixtures or matching practical lamps. CALIBRATION Point at a known 5600K reference and take a five-second calibrated reading. The app stores a custom offset for your device and shooting conditions, improving consistency across a whole production. Built by a working DP — because practical fixtures don't ask permission, and bad light costs money in post. No account. No data collected. Everything runs on your device. Available as an annual subscription or one-off lifetime purchase. Pricing and terms are shown at first launch. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | UltraSync Blue Slate | ColourTemp |
|---|---|---|
| Price | Free | Free |
| Rating | 3.3 (4 ratings) — better | 3.0 (4 ratings) |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| Number of ratings | 4 | 4 |
| Update frequency | Every 13 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Subscription |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 2 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Atomos Ltd. | High Water Films Limited |
Customer experience
UltraSync Blue Slate
ColourTemp
In-app purchases
UltraSync Blue Slate
No in-app purchases
ColourTemp
- ColourTemp Annual$9.991 Year
- Lifetime access$19.99
Questions
Is UltraSync Blue Slate free?
Is ColourTemp free?
Which has better reviews, UltraSync Blue Slate or ColourTemp?
Do UltraSync Blue Slate or ColourTemp have ads?
Which is updated more often, UltraSync Blue Slate or ColourTemp?
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