AtCoder Alarm vs TimerCal
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AtCoder Alarm
This alarm clock requires users to solve a simple programming problem to turn it off. Problems are randomly selected from past AtCoder "A" tasks. Ensure you wake up on time with this unique challenge.
- Solve programming problems to stop alarm
- Random AtCoder "A" task selection
- Ensures waking up
- Requires AtCoder pre-registration
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This App is an alarm clock that doesn't stop until solving an easy problem of AtCoder (competitive programming web site). The problem is chosen randomly from "A" tasks of past ABCs. Let's make sure to wake up! * Pre-registration with AtCoder is required.
TimerCal
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■ Your schedule, turned into focus TimerCal is a calendar that starts timers. Check today's events, tap the timer icon next to any of them, and the clock starts running. No more switching to a separate timer app after looking at your schedule. ■ Made for you if you want to ・Spend your study or work hours the way you planned them ・Run several timers at once while cooking or doing chores ・Keep a clean, simple calendar that shows holidays at a glance ・Look back on how much time you actually spent on what ■ A calendar that knows today ・National holidays shown automatically, computed fully offline ・Start the week on Monday or Sunday; Saturdays in blue, Sundays in red ・Smooth, continuous scrolling from 2000 to 2100 ■ A timer next to every event ・Tap a date and the day's events slide up in a sheet ・Count down the planned length, or measure real time with a stopwatch ・Create events with repeats, alerts, and a target calendar ・Sync with the iOS Calendar (EventKit), or keep events local to the app ■ Rings even when the app is closed ・Built on AlarmKit for iOS 26 — your alarm fires reliably in the background ・Remaining time on the Lock Screen and in the Dynamic Island ・Pause or extend by +1/+5/+10 minutes right from the Lock Screen ■ As many timers as you need ・Run multiple countdowns and stopwatches at the same time ・See everything running in the bar at the bottom; swipe to delete ■ Your time, logged automatically ・When a timer ends, the time spent is saved back to that day's event (optional) ・Review where your hours went just by browsing your calendar ■ Design and details ・Two monochrome skins — Ivory and Mono — each with light and dark mode ・Monospaced digits, subtle haptics, and a calm, refined feel ・A friendly tutorial and in-app tips to get you started ・Fully localized into 34 languages ■ Privacy first Calendar access is optional. Without it, the app works fine with local events and offline holidays. ■ About ads A banner ad is shown at the bottom of the screen. You can remove all ads anytime with a one-time purchase in Settings. Start by timing just one event today. Time you used to just look at becomes time you focus. Requires iOS 26.0 or later. Works on iPhone and iPad. ■ About the In-App Purchase ・"Remove Ads" is a one-time (non-consumable) purchase ・Payment will be charged to your Apple ID account at confirmation of purchase ・You can restore it for free anytime via "Restore Purchases" Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://kiyaku.mylastwork.net/pryvacy
Screenshots
Verdict
The clearest difference is ads: AtCoder Alarm at none against TimerCal's shown. AtCoder Alarm also leads on update cadence (daily vs every 4 days) and iOS requirement (15.5 vs 26.0). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
AtCoder Alarm ships an update daily, TimerCal every 4 days. The most recent releases landed on September 6, 2026 and September 19, 2026 respectively.
| Parameter | AtCoder Alarm | TimerCal |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| Update frequency | Daily — better | Every 4 days |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.5 — better | 26.0 |
| Further details — not scored | ||
| Size | 27 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Kiichi Ito | Takashi Hamanaka |
In-app purchases
AtCoder Alarm
No in-app purchases
TimerCal
No in-app purchases









