Comparison

HYCAL vs Clockwork

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

HYCAL

Features
Read full description

Solubility Calculator for Alloys of Molten Aluminium

About

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.

Highlights
  • Measure accuracy using images
  • Atomic clock synchronization
  • Accuracy over time graphs
  • Store detailed watch information
  • Dark mode support
  • Digital and analog atomic clock
Features
Read full description

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

Screenshots

HYCAL2 screens
Clockwork4 screens

Verdict

The call

The clearest difference is in-app purchases: HYCAL at none against Clockwork's 1. HYCAL also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.4). Clockwork's advantage is update cadence (every 3 weeks vs every 2 months). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Clockwork sells 1 one-off in-app purchase. HYCAL asks for nothing beyond the download.

UpkeepUpdate frequency

HYCAL ships an update every 2 months, Clockwork every 3 weeks. The most recent releases landed on September 28, 2026 and October 11, 2026 respectively.

Scorecard4 real differences · 6 level
HYCAL versus Clockwork: the parameters behind the verdict, then further details
ParameterHYCALClockwork
PriceFreeFree
Rating—4.4 (24 ratings) — better
Positive reviews—42.9% of reviews
Number of ratings—24 — better
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better16.4
Further details — not scored
Size1 MB242 MB
Age rating4+4+
DeveloperEnvironmental Monitoring & Control LtdAppfred AS

In-app purchases

None

HYCAL

No in-app purchases

1 purchases

Clockwork

One-time1
  • Clockwork Premium$5.99

Questions

Is HYCAL free?
HYCAL is free to download, with no in-app purchases.
Is Clockwork free?
Clockwork is free to download, with in-app purchases available.
Do HYCAL or Clockwork have ads?
Neither HYCAL nor Clockwork shows ads.
Which is updated more often, HYCAL or Clockwork?
HYCAL ships an update every 2 months, and Clockwork every 3 weeks. Most recently, HYCAL was updated on September 28, 2026 and Clockwork on October 11, 2026.

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