HamClock vs Ham Callsigns
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HamClock
This app provides a clear display of local and UTC time, along with sunrise/sunset and grid square information for amateur radio operators. It features an interactive map to find grid squares and displays the gray line. Optimized for both phone and watch, it's a useful tool for ham radio enthusiasts.
- Local and UTC time display
- Sunrise/sunset times
- Grid square locator
- Interactive grid square map
- Gray line display
- Watch compatibility
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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.
Ham Callsigns
Instantly look up amateur radio callsigns to find contact details, including distance, bearing, and local time. This reference tool helps ham radio operators quickly access essential information for their communications.
- QRZ callsign lookup
- Contact distance and bearing
- Local time of contacts
- Ham radio reference tool
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Lookup ham radio callsigns on QRZ. Discover distance / bearing and local time of the contacts you are making on the radio.
Screenshots
Verdict
The clearest difference is price: Ham Callsigns at Free against HamClock's $0.99. Ham Callsigns also leads on rating (4.4 vs 3.0) and update cadence (weekly vs every 4 months). On ratings volume, 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
Ham Callsigns is free to download; HamClock costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Ham Callsigns holds the better App Store score, 4.4 against 3.0. Both are backed by a comparable volume of ratings — 24 and 14 respectively. Written reviews point the same way: 48% of HamClock's written reviews are positive against 78% of Ham Callsigns's.
HamClock ships an update every 4 months, Ham Callsigns weekly. The most recent releases landed on October 7, 2026 and September 23, 2026 respectively.
| Parameter | HamClock | Ham Callsigns |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 3.0 (24 ratings) | 4.4 (14 ratings) — better |
| Positive reviews | 47.8% of reviews | 77.8% of reviews — better |
| Number of ratings | 24 — better | 14 |
| Update frequency | Every 4 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad, iPod |
| Requires iOS | 13.4 | 12.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 40 MB |
| Age rating | 4+ | 4+ |
| Developer | Ben Sinclair | Staton Systems LLC |
Customer experience
HamClock
Ham Callsigns
In-app purchases
HamClock
No in-app purchases
Ham Callsigns
No in-app purchases
