Comparison

Simple Timer & Alarm ListTimer vs CoreUnit

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

Head to head
About

Simple Timer & Alarm ListTimer

This app offers a simple, one-tap timer for various activities like focus, study, and workouts. It displays finish times, works in the background with notifications, and supports vibration for silent mode. An upgrade option removes ads and adds lock screen countdowns and custom sounds.

Highlights
  • One-tap start
  • Finish times displayed
  • Background notifications
  • Vibration for silent mode
  • Easy repeat function
  • Battery friendly operation
Features
Read full description

ListTimer is a free timer app that can be started with just one tap. It displays end times and works in the background. ●One Tap to Start All you have to do is tap it once. ●Finish Times Displayed on Screen It shows the time your alarm will finish. ●Notifies You in Background When the timer ends, ListTimer also notifies you in the background. ●Vibration ListTimer vibrates your device so you can also use it in silent mode. ●Repeat Easily Tap the repeat button to repeat the timer at intervals. ●Battery Friendly ListTimer doesn't consume your battery power in the background because it notifies you after you close the app. URL Scheme = "listtimer:" @http://icons8.com/ ■■ Upgrade ■■ - No Ads - Countdown on Lockscreen - Change Alarm Sound - Customize Theme Color - Longer Interval Settings - Save 2 or More Favorites 【Privacy Policy and Term of Use】 https://texttospeech.helpshift.com/a/timerapp/?l=en&s=help&f=privacy-policy

About

CoreUnit

Features
Read full description

CoreUnit is a simple yet powerful utility designed for your daily life. Convert everything from basic units to complex date calculations in one clean, intuitive interface. No more searching for different calculators – CoreUnit has the core essentials you need. Key Features: - Unit Conversion: Easily convert Length, Speed, Weight, Volume, and Area. - Date Converter: Seamlessly switch between Solar and Lunar calendars. - Date Calculator: Calculate D-Days and add/subtract days from any specific date. - Modern Interface: A clean, ad-supported free service with a focus on user experience.

Screenshots

Simple Timer & Alarm ListTimer4 screens
CoreUnit4 screens

Verdict

The call

The clearest difference is in-app purchases: CoreUnit at none against Simple Timer & Alarm ListTimer's 4. Simple Timer & Alarm ListTimer's advantage is update cadence (every 5 days vs every 3 weeks). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Simple Timer & Alarm ListTimer sells 4 in-app purchases, starting at $0.49 per 7 days. CoreUnit asks for nothing beyond the download.

UpkeepUpdate frequency

Simple Timer & Alarm ListTimer ships an update every 5 days, CoreUnit every 3 weeks. The most recent releases landed on October 10, 2026 and October 6, 2026 respectively.

Scorecard2 real differences · 8 level
Simple Timer & Alarm ListTimer versus CoreUnit: the parameters behind the verdict, then further details
ParameterSimple Timer & Alarm ListTimerCoreUnit
PriceFreeFree
Rating4.7 (303 ratings) — better—
Positive reviews89.1% of reviews—
Number of ratings303 — better—
Update frequencyEvery 5 days — betterEvery 3 weeks
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better16.0
Further details — not scored
Size36 MB5 MB
Age rating4+4+
DeveloperLemon LLCYounghan Kim

Bugs and requests

Simple Timer & Alarm ListTimer

Reported bugs

5 issues
  • Alarm fails to trigger when app is closed or locked
  • Vibration doesn't work reliably in background
  • App fails to download (stuck on iCloud icon)
  • Notification bar alert insufficient to wake users
  • Inconsistent vibration performance in some scenarios

Requested features

7 requests
  • 12-hour time format option for end-time display
  • Independent alarm volume control (separate from phone volume)
  • Simpler repeat function toggle (zero repeat option in settings)
  • Text/description field to note what timer is for
  • Interval repetition with alerts
Show 2 more
  • Larger font size option
  • Custom time ranges including seconds

CoreUnit

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

Simple Timer & Alarm ListTimer

Subscriptions3
  • ListTime One Weeek$0.497 Days
  • ListTimer Plus$2.491 Month
  • ListTimer Plus7 Days trial$14.991 Year
One-time1
  • ListTimer Plus$4.99
None

CoreUnit

No in-app purchases

Questions

Is Simple Timer & Alarm ListTimer free?
Simple Timer & Alarm ListTimer is free to download, with in-app purchases available.
Is CoreUnit free?
CoreUnit is free to download, with no in-app purchases.
Do Simple Timer & Alarm ListTimer or CoreUnit have ads?
Both Simple Timer & Alarm ListTimer and CoreUnit show ads.
Which is updated more often, Simple Timer & Alarm ListTimer or CoreUnit?
Simple Timer & Alarm ListTimer ships an update every 5 days, and CoreUnit every 3 weeks. Most recently, Simple Timer & Alarm ListTimer was updated on October 10, 2026 and CoreUnit on October 6, 2026.

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