Call By Color vs OnTime Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Call By Color
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Instead of searching a number in your contacts or the lengthy list of favorites this app provides direct access to your 12 most important phone numbers. Call your friends and your family members with a single touch. Use nicknames instead of the full names from the address book. You can increase the font size up to 64 points to increase the legibility. The app supports also voice over and can read the displayed names. And if you like to change the colors, then just shake your iPhone. Privacy statement: the names and numbers you store with this app stay on your device. This app doesn't collect any information about you. Features: • store up to 12 phone numbers • initiate phone calls by touching a tile • swipe up to display the settings • double-tap a tile to enter name and number • select an entry from your contacts • change the name to an individual nickname • increase the font size for better legibility • change colors by shaking your iPhone • supports voice over • data privacy • no ads • available languages: English, German, French This app is designed specifically for iPhones and makes use of the phone call capabilities. You can't make phone calls on iPods and iPads.
OnTime Clock
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OnTime Clock — Always rings. Never late. 【6 Alarm Types】 • Standard Alarm: Daily reminders at fixed times • Fixed Alarm: One-time reminder for a specific date • Quick Alarm: Countdown timer, rings in minutes • Habit Alarm: Multiple reminders for one task, build good habits • Location Alarm: Auto check-in at work, reminders when leaving home • Hourly Chime: Automatic time announcement every hour 【Habit Building】 • Medication, water, exercise — never miss multiple daily reminders • 30+ habit templates, add with one tap • 20+ motivational quotes displayed randomly 【Smart Features】 • Auto-skip holidays, rings only on workdays • Regional holiday database for Greater China • Home screen widget shows your next alarm at a glance • Dynamic Island displays countdown in real time 【Native iOS 26 Experience】 • Built on AlarmKit — rings even on silent or locked screen • Liquid Glass design — smooth and beautifully native 【Privacy First】 • All data stored locally on your device • No network, no tracking, no ads, no in-app purchases • Free forever
Screenshots
Verdict
The clearest difference is update cadence: Call By Color at every 4 weeks against OnTime Clock's every 2 months. Call By Color also leads on iOS requirement (7.0 vs 26.0). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Call By Color ships an update every 4 weeks, OnTime Clock every 2 months. The most recent releases landed on October 26, 2026 and October 11, 2026 respectively.
| Parameter | Call By Color | OnTime Clock |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 7.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 2 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Andreas Vogel | 文巧 刘 |
In-app purchases
Call By Color
No in-app purchases
OnTime Clock
No in-app purchases









