One Alarm vs TiZo Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
One Alarm
A minimalist alarm clock designed for simplicity. Set alarms with a single tap by dragging the minute hand. A badge on the app icon shows a countdown to the alarm time.
- Minimalist interface
- One-tap alarm setting
- Drag minute hand to set time
- AM/PM quick switch
- Icon countdown badge
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One Alarm is a minimal alarm clock. Drag the minute hand to set the alarm time. Drag or tap the switches to turn the alarm ON/OFF and quickly set AM/PM. If you’re sick of complicated alarm interfaces, One Alarm is for you. Tapping through multiple menus just to set an alarm is tedious. With One Alarm, you can set an alarm with one tap. Simply set the alarm and exit the app. A badge on the One Alarm icon will appear and countdown every hour to show approximately how many hours are left until the alarm sounds. We hope you like it! Love, CW&T
TiZo Pro
This utility app displays the time in two different time zones simultaneously, with options for a day/night indicator and sound effects. It also includes a sub-screen for scheduling appointments and converting times.
- Dual time zone display
- Day/night indicator
- Tick-tack sound effect
- Schedule appointments
- Time conversion tool
- 130+ city time zones
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"Tell me the local time in Sheffield!! Is it daylight saving time in now?" OK! Please set in "London", the time zone of TiZo Pro. TiZo Pro have two face dial, and show you time of two time zones. It is only that much, but it is quite useful when you want to watch big events overseas on TV. You can choose a time zone among 130 cities. The time zone of clock(above), it is set in the Slide Menu. And the clock(below) is set in the Settings screen. Day/night indicator option represents the approximate time by symbol of sun and moon. This is not moon phase. Sound effect option plays tick-tack noise like mechanical clock. TiZo Pro have a sub screen for schedule, and you can write appointments into the built-in calendar app. This screen is very similar to the main screen, but the minute-hand can be moved by drag. To change the time, please trace the finger twirling the face. To change the date, tap the date, please. Date picker appears. Convert screen has the ability to be notified by the reminder at that time. NOTE. This app allows you to write appointments to built-in calendar app. What has been written may be synchronized, public and share based on the settings of calendar app. We recommend that you use this app after make sure the settings of calendar app. This app, which has been prepared to convert the time as accurately as possible. That the system or changes in daylight saving time in each country, will be converted incorrectly may occur. Please acknowledge it.
Screenshots
Verdict
The clearest difference is review sentiment: One Alarm at 51% against TiZo Pro's 0%. One Alarm also leads on price (Free vs $0.99) and rating (3.7 vs 3.0). TiZo Pro's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement 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
One Alarm is free to download; TiZo Pro costs $0.99 up front. One Alarm sells 1 one-off in-app purchase. TiZo Pro asks for nothing beyond the download.
One Alarm holds the better App Store score, 3.7 against 3.0. That said, the two scores are not equally well evidenced: One Alarm has 20 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 51% of One Alarm's written reviews are positive against 0% of TiZo Pro's.
One Alarm ships an update every 3 weeks, TiZo Pro every 5 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.
| Parameter | One Alarm | TiZo Pro |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 3.7 (20 ratings) — better | 3.0 (1 ratings) |
| Positive reviews | 50.9% of reviews — better | 0.0% of reviews |
| Number of ratings | 20 — better | 1 |
| Update frequency | Every 3 weeks — better | Every 5 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 3 MB | 57 MB |
| Age rating | 4+ | 4+ |
| Developer | CW&T | Blowbend.jp |
Customer experience
One Alarm
TiZo Pro
In-app purchases
One Alarm
- instant unlock$0.99
TiZo Pro
No in-app purchases
