Comparison

Student Lifeline vs One Kanji Clock

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

Head to head
About

Student Lifeline

This app provides a safety tool for students and others, allowing them to send SOS alerts with their location to pre-set emergency contacts. It prioritizes privacy and aims to offer peace of mind and a sense of security.

Highlights
  • SOS alerts to emergency contacts
  • Real-time location sharing
  • Up to three trusted contacts
  • Privacy-focused data handling
  • Annual subscription for full access
Features
Read full description

Student Lifeline is a comprehensive app designed to empower students, and anyone else for that matter, with a powerful safety tool at their fingertips. Student Lifeline helps you stay connected and safe. Student Lifeline Key Features: - SOS Alerts: In an emergency situation, simply tap the ALERT! button to instantly send an SOS to up to three pre-set emergency contacts. They will receive your exact location, allowing them to promptly assist you. - Trusted Contacts: Specify up to three trusted contacts who will receive your SOS alerts and be kept updated on your status during emergencies. Student Lifeline prioritizes your safety without compromising your privacy. Rest assured that your personal information and location data are securely stored and only shared with your designated emergency contacts. Our mission is to provide peace of mind and a sense of security for all students. With Student Lifeline, we believe that every student should have access to a reliable safety net. Download Student Lifeline today and take control of your safety while pursuing your studies. The Student Lifeline app can only be used by purchasing and maintaining an auto-renewing subscription through an In-App Purchase. (If you do not maintain a subscription you will be unable to access the primary functions of this app.) Student Lifeline Subscriptions • Annual Auto-renewable subscription ($12.00) required. • Your subscription will be charged to your App Store account at confirmation of purchase and will automatically renew annually unless auto-renew is turned off at least 24 hours before the end of the current period. • Privacy policy: https://studentlifeline.com/privacy-policy/ • Terms of Service/EULA: https://studentlifeline.com/terms/

About

One Kanji Clock

Features
Read full description

This clock displays kanji characters for your enjoyment. Kanji characters are displayed one at a time in random, and change over as time passes. The size of the characters can be changed in three levels.  The length of the switching time can be adjusted. Hiragana and English can also be displayed.  There are more than 700 kanji in the database. The number is small at first, but it will gradually increase. You can also choose your favorite kanji to display. You can choose from 20 different backgrounds. A time signal can be set to sound at 0 minutes.  You can choose from 78 different sounds for the time signal.

Screenshots

Student Lifeline3 screens
One Kanji Clock4 screens

Verdict

The call

The clearest difference is ads: Student Lifeline at none against One Kanji Clock's shown. Student Lifeline also leads on update cadence (every 2 days vs every 2 months). On price, in-app purchases, 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. Student Lifeline sells 1 in-app purchase, starting at $12.00 per year and One Kanji Clock sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Student Lifeline ships an update every 2 days, One Kanji Clock every 2 months. Both last shipped on November 3, 2026.

Scorecard2 real differences · 7 level
Student Lifeline versus One Kanji Clock: the parameters behind the verdict, then further details
ParameterStudent LifelineOne Kanji Clock
PriceFreeFree
Rating4.3 (4 ratings) — better—
Number of ratings4 — better—
Update frequencyEvery 2 days — betterEvery 2 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationSubscription—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS11.0 — better12.0
Further details — not scored
Size31 MB18 MB
Age rating4+4+
DeveloperNoble & Masters Marketing IncMihoko Araki

In-app purchases

1 purchases

Student Lifeline

Subscriptions1
  • Yearly Subscription$12.001 Year
1 purchases

One Kanji Clock

One-time1
  • One Kanji Clock with no ads$2.99

Questions

Is Student Lifeline free?
Student Lifeline is free to download, with in-app purchases available.
Is One Kanji Clock free?
One Kanji Clock is free to download, with in-app purchases available.
Do Student Lifeline or One Kanji Clock have ads?
One Kanji Clock shows ads; Student Lifeline does not.
Which is updated more often, Student Lifeline or One Kanji Clock?
Student Lifeline ships an update every 2 days, and One Kanji Clock every 2 months. Most recently, Student Lifeline was updated on November 3, 2026 and One Kanji Clock on November 3, 2026.

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