tcCalc vs UltraSync Blue Slate
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
tcCalc
This calculator specializes in timecode and frame-based calculations, offering a familiar interface for quick conversions and duration calculations. It supports multiple frame rates and allows for easy copying and pasting of results.
- Timecode and frame calculations
- Convert between timecode and frames
- Supports multiple frame rates
- Automatic value adjustment
- Copy and paste functionality
- Memory function
- Calculation history
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tcCalc is a calculator built for one job: timecode math in video production. Add and subtract timecode, let it handle drop frame for you, and switch to a frame count with a single tap - all with the feel of an ordinary calculator. Supported frame rates 23.98 / 24 / 25 / 29.97 / 30 / 50 / 59.94 / 60 fps, plus hh:mm:ss for working without frames. Drop frame is applied automatically at 29.97 and 59.94 fps. Features - Add and subtract timecode - One-tap switching between timecode and frame count - Automatic drop frame handling (29.97 / 59.94 fps) - hh:mm:ss mode - Constant calculation for repeating the same operation - Memory functions (add, subtract, recall, clear) - Calculation history (up to 20 entries, tap to restore) - Copy and paste - Dark mode - iPhone and iPad, all four orientations - Dynamic Type and VoiceOver support Simple by design - No ads - No in-app purchases - No network access - works entirely offline - No analytics and no tracking Whether you are timing a shoot, finding an edit point, or adding up the length of your footage, tcCalc keeps the math out of your way.
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
Screenshots
Verdict
The clearest difference is review sentiment: tcCalc at 63% against UltraSync Blue Slate's 0%. tcCalc also leads on rating (4.7 vs 4.0) and update cadence (every 3 months vs every 13 months). UltraSync Blue Slate's advantage is price (Free vs $0.99) and iOS requirement (15.0 vs 17.6). On ads, in-app purchases and device support 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
UltraSync Blue Slate is free to download; tcCalc costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
tcCalc holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: tcCalc has 76 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 63% of tcCalc's written reviews are positive against 0% of UltraSync Blue Slate's.
tcCalc ships an update every 3 months, UltraSync Blue Slate every 13 months. The most recent releases landed on September 23, 2026 and June 5, 2026 respectively.
| Parameter | tcCalc | UltraSync Blue Slate |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.7 (76 ratings) — better | 4.0 (3 ratings) |
| Positive reviews | 63.2% of reviews — better | 0.0% of reviews |
| Number of ratings | 76 — better | 3 |
| Update frequency | Every 3 months — better | Every 13 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | RYUICHIROU SHIMONO | Atomos Ltd. |
Customer experience
tcCalc
UltraSync Blue Slate
In-app purchases
tcCalc
No in-app purchases
UltraSync Blue Slate
No in-app purchases
