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HamClock

by Ben Sinclair

  • Reference
  • Paid
  • Zombie
  • Small & simple · 87
View on the App Store
Rating
2.9
25 ratings
Top 87%among 235 Reference apps
Last update
Feb 6, 2024
Version 3.5.1
Size
2 MB
Category
Reference
Tracked since
Oct 10, 2026

Estimated revenue

A model estimate with a likely range, not a reported figure.

No estimate. Apps outside the grossing charts, and some countries, have no reliable rank-to-revenue curve, so we show nothing rather than a guess.

How this estimate is made

Rank: we take the app's best Top Grossing rank on the latest chart day. Category ranks are converted into an equivalent overall rank, because a #10 in Finance earns far less than a #10 overall.

Curve: that equivalent rank is read off a rank-to-revenue curve anchored on public company revenue and market-data reports for the US iPhone App Store.

Country: the curve is scaled per country (Japan is roughly a third of the US, Türkiye under 1%). Where we have no scale, such as China, there is no estimate.

Range: the likely range widens with country, category and chart depth. It is a plausible span, not a statistical confidence interval.

Not included: ads, payments outside the App Store, and any difference between gross sales and what the developer keeps. Low confidence means indirect data; medium means several independent sources agree.

Full method

Screenshots

As shown on the App Store listing.

About this app

Text from the App Store listing.

HamClock is a handy clock with features for amateur radio operators!

One screen shows your local time in 12H and 24H format along with UTC in large, easy to read text. If your location is available, your grid square, local sunrise and sunset are also displayed.

An interactive grid square map lets you find the grid square for any location, and displays the current gray line.

Flip to landscape mode for a larger UTC time display. Great for keeping track of things while operating.

On your watch, you can also quickly display your grid square and location.

HamClock is great for finding your grid square while traveling, or use it as a handy clock in your shack.

What’s new

Release notes for the latest version, as written by the developer.

v3.5.1

This app has been updated by Apple to prepare for watchOS 27 compatibility. No new features are included.

  • Added UTC time to watch app

Rank history

Daily position in the US charts. #1 is at the top.

Best rank
#22
Current rank
#100
Days charting
6 of 7

On the charts today

Small & simple score

How realistic it is for a small team to build something like this.

87/100

Small & simple

  • Developer size70% · 25

    Developer: 2 apps on the charts

  • Audience size100% · 20

    Ratings: 25

  • App size100% · 10

    Size: 2 MB

  • Price model100% · 15

    Price model: paid

  • Demand proof80% · 30

    Best rank #1, 4 countries

An indicator, not a fact. We can't see team size. Calculated Oct 24, 2026 · method i2

How the score works

Gap check · UK

Is this US chart app missing in UK?

Already on UK charts

It showed up on a UK chart in the last 30 days, so it is not a gap.

Store not checked yet

This is a candidate, not a verdict. Charts show at most 100 apps, so not charting does not mean no demand. Check the UK store before you decide.

See all gaps

Version history

  • 3.5.1LatestReleased Feb 6, 2024