Comparison

SignalClock vs Dots Calendar

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

Head to head
About

SignalClock

Features
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Digital clock has time signal function based on Local Notification Center. 5 different signal sound sets (Digital Clock, Cuckoo, Voice, Whittington Chime,Church Bell). All fonts iOS 10 supports are available in clock. 5 tone type are available in all sound file sets.

About

Dots Calendar

Features
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DOTS CALENDAR โ€” Countdown Widget Dots Calendar puts a beautiful, minimal calendar right on your home screen. Every day of the month is rendered as a filled circle, giving you an instant visual sense of where you are in the month โ€” and how much time you have left until the next big day! SET A DEADLINE. Watch the days count down. Add a target date and Dots Calendar shows you exactly how many days remain. Whether you're counting down to a trip, a deadline, an event, or anything else that matters to you, the countdown is always a glance away. PROGRESS AT A GLANCE. Enable the progress bar to see a visual timeline stretching from your chosen start date to your deadline. No numbers to crunch โ€” just a clean, satisfying bar that moves a little each day. MAKE IT YOURS. Customise the colour of today's marker, your deadline day, and the widget background. Prefer a fixed look regardless of your system appearance? Switch between Dynamic, Light, and Dark background modes with a single tap. SIMPLE. PRIVATE. NO NONSENSE. Dots Calendar collects no data, requires no account, and has no subscription. A one-time Lifetime license unlocks full colour customisation.

Screenshots

SignalClock1 screens
Dots Calendar4 screens

Verdict

The call

The clearest difference is price: Dots Calendar at Free against SignalClock's $0.99. Dots Calendar also leads on update cadence (every 5 weeks vs every 5 months). SignalClock's advantage is in-app purchases (none vs 1) and iOS requirement (12.0 vs 18.2). On ads and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Dots Calendar is free to download; SignalClock costs $0.99 up front. Dots Calendar sells 1 one-off in-app purchase. SignalClock asks for nothing beyond the download.

UpkeepUpdate frequency

SignalClock ships an update every 5 months, Dots Calendar every 5 weeks. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

Scorecard4 real differences ยท 2 level
SignalClock versus Dots Calendar: the parameters behind the verdict, then further details
ParameterSignalClockDots Calendar
Price$0.99Free โ€” better
Update frequencyEvery 5 monthsEvery 5 weeks โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPad
Requires iOS12.0 โ€” better18.2
Further details โ€” not scored
Size103 MB1 MB
Age rating4+4+
DeveloperMasafumi EndohNicolas Schimmelpfennig

In-app purchases

None

SignalClock

No in-app purchases

1 purchases

Dots Calendar

One-time1
  • Lifetime license$2.99

Questions

Is SignalClock free?
SignalClock costs $0.99, with no in-app purchases.
Is Dots Calendar free?
Dots Calendar is free to download, with in-app purchases available.
Do SignalClock or Dots Calendar have ads?
Neither SignalClock nor Dots Calendar shows ads.
Which is updated more often, SignalClock or Dots Calendar?
SignalClock ships an update every 5 months, and Dots Calendar every 5 weeks. Most recently, SignalClock was updated on October 13, 2026 and Dots Calendar on October 7, 2026.

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