Clockwork vs Scratch
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Clockwork
This app allows you to measure the accuracy of your watches using your phone's camera. It compares an image of your watch to an atomic clock to calculate its timekeeping offset. Track accuracy over time with graphs and store detailed watch information.
- Measure accuracy using images
- Atomic clock synchronization
- Accuracy over time graphs
- Store detailed watch information
- Dark mode support
- Digital and analog atomic clock
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Measure the accuracy of your watches today! Clockwork includes several useful features. You can store watch information, measure watch accuracy, and set your watch using a clock synchronized with atomic time. Check it out now! _MEASUREMENTS USING IMAGES_ Most other watch measurement apps require either third-party equipment or that you press a button at a specific time. Additional equipment is often expensive, and timing a button press is difficult to do precisely. Clockwork solves this by letting you take a picture of your watch and indicate the time shown in the image. We then synchronize the image capture time with atomic time before comparing it with the time shown on the watch to calculate an offset. Taking measurements over time provides a real-world view of your watch's accuracy. _GRAPHS_ Watch your measurements over time on a beautifully crafted graph. The graph shows how your watch's accuracy changes over time and offers several modes to help you understand its performance. _WHY MEASURE?_ Knowing the accuracy of your watch is interesting on its own, but it also has several practical uses. It can indicate when it is time for a service, and documented accuracy could increase resale value, especially for vintage watches. _STORE DETAILED INFORMATION_ In case of theft or accidents, it will always help to have your information stored in a secure place. _ATOMIC CLOCK, DARK MODE AND MUCH MORE!_ Clockwork includes an atomic clock in both digital and analog formats to help you set your watch as precisely as possible. Powerful settings such as Dark or Light mode, separate day and date formats, and different ways to sort your watches let you customize the app to your liking. // Appfred AS © 2026
Scratch
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Scratch turns your iPad and Apple Pencil into the fastest notebook you own. Open the app, put Pencil to page, and start writing. No menus, no setup, no friction. HANDWRITTEN NOTES • Buttery-smooth Apple Pencil inking built on Apple's native PencilKit, for the low-latency feel you expect from paper. • Clean, distraction-free A4 dotted pages that scroll vertically and add themselves as you go, so there's always fresh space ahead. • A premium set of tools that stay out of your way: pen, highlighter, eraser, lasso select, custom colors, and adjustable widths. • Pencil writes, finger scrolls and zooms, exactly the way it should work. PDF MARKUP • Import any PDF from Files and annotate right on top with your Pencil. • Select text and highlight it in five colors, Google-Books style. • Your original PDF is always preserved. Annotations live on their own layer. STAY ORGANIZED • A clean sidebar library of folders that hold both notes and PDFs together. • Rename, move, and organize with a tap. • A thumbnail grid so you can see everything at a glance. BUILD THE HABIT • A Home dashboard with your writing streak, an orange contribution grid, and quick stats. • Jump straight back into your recent work. YOURS, EVERYWHERE • Sign in with Apple or Google and your notes and PDFs sync securely to the cloud. • Pick up on your iPhone with the Scratch companion to read and review on the go. • Full control of your data. Delete any note, or your entire account, right from the app. CONNECTORS, COMING SOON • We're building connectors so Scratch plugs into the tools you already use. Handwrite and mark up today, connect your workflow soon. Beautiful dark interface. Built entirely with native Apple frameworks for speed and smoothness. No clutter, no distractions. Just you and the page.
Screenshots
Verdict
The clearest difference is in-app purchases: Scratch at none against Clockwork's 1. On price, ads, device support and iOS requirement 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. Clockwork sells 1 one-off in-app purchase. Scratch asks for nothing beyond the download.
| Parameter | Clockwork | Scratch |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (24 ratings) — better | — |
| Positive reviews | 42.9% of reviews | — |
| Number of ratings | 24 — better | — |
| Update frequency | Every 3 weeks | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.4 — better | 17.0 |
| Further details — not scored | ||
| Size | 242 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Appfred AS | Manav Shah |
In-app purchases
Clockwork
- Clockwork Premium$5.99
Scratch
No in-app purchases









