Comparison

Shared Diary vs Tensei Algorithm

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

Head to head
About

Shared Diary

Features
Read full description

[Overview] This is a diary app that lets you share your days with people you care about. Here are some ways you can use it: * Jot down your thoughts and feelings as a personal diary * Share your daily life with close friends or your partner * Talk about your day with your child * Use it with your spouse to share little things—like gratitude, happy moments, or updates about the kids * Use it in a small team to keep track of daily work or share reports Once you get into the habit of writing a diary, you start noticing more things around you. It helps you become more aware of the little joys in everyday life, and it also strengthens your ability to express your thoughts in words. Being able to put your feelings and ideas into words boosts your communication skills, which can really help in your relationships—at school, work, or at home. If reading this made you think, "Maybe I’ll give diary writing a try," we’re happy to hear it. Even writing just 20 or 30 characters a day is totally fine. And honestly, you don’t even need to use this app—we just hope it encourages you to start. [Recommended for people who] * Want a simple, easy-to-use diary app * Want to build a daily writing habit * Feel shy about expressing feelings out loud * Want to do a shared/partner diary * Don’t want to exchange LINE but still want a casual way to communicate in text Term of service(EULA): https://originate-aster.co.jp/shared-diary/terms privacy policy: https://originate-aster.co.jp/privacy-policy/

About

Tensei Algorithm

Features
Read full description

This app is a soul growth app where you record your daily good deeds and level up your soul. By the time you reach dungeon layer x, level x, you may find that your daily life looks different. ■ Soul Diagnosis Start with a soul diagnosis. Choose from two methods — a diagnostic test or a crystal reading — to discover your current soul state. ■ Record Your Good Deeds Select the good things you did today from each category and add optional notes. Points are added and your soul levels up. ■ Events When you reach a certain species or score, a floor-up chance appears! Level up by one, go up big, drop down, or hold your ground — some events let you choose whether to take the chance. ■ View Your Good Deed History Your accumulated good deeds are saved as a history. As you look back on what you've done, you may find yourself recognizing your own growth and building confidence. ■ Check the Reincarnation Log A roadmap showing your past, present, and next stage. Track the changes in your soul's species and level. New information is revealed with each level-up, but some remains sealed. ■ Soul Orb Each species has its own soul color. Enjoy watching your orb change with every level-up.

Screenshots

Shared Diary4 screens
Tensei Algorithm4 screens

Verdict

The call

The clearest difference is in-app purchases: Tensei Algorithm at none against Shared Diary's 1. Tensei Algorithm also leads on update cadence (every 5 days vs fortnightly). Shared Diary's advantage is iOS requirement (16.0 vs 26.2). On price, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Shared Diary sells 1 in-app purchase, starting at $2.99 per month. Tensei Algorithm asks for nothing beyond the download.

UpkeepUpdate frequency

Shared Diary ships an update fortnightly, Tensei Algorithm every 5 days. The most recent releases landed on September 24, 2026 and September 21, 2026 respectively.

Scorecard3 real differences · 3 level
Shared Diary versus Tensei Algorithm: the parameters behind the verdict, then further details
ParameterShared DiaryTensei Algorithm
PriceFreeFree
Update frequencyFortnightlyEvery 5 days — better
AdsYesYes
In-app purchasesYesNo — better
DevicesiPhoneiPhone
Requires iOS16.0 — better26.2
Further details — not scored
Size41 MB29 MB
Age rating4+4+
DeveloperOriginate Aster, Inc.KAORU IMAI

In-app purchases

1 purchases

Shared Diary

Subscriptions1
  • Proプラン(1か月間)$2.991 Month
None

Tensei Algorithm

No in-app purchases

Questions

Is Shared Diary free?
Shared Diary is free to download, with in-app purchases available.
Is Tensei Algorithm free?
Tensei Algorithm is free to download, with no in-app purchases.
Do Shared Diary or Tensei Algorithm have ads?
Both Shared Diary and Tensei Algorithm show ads.
Which is updated more often, Shared Diary or Tensei Algorithm?
Shared Diary ships an update fortnightly, and Tensei Algorithm every 5 days. Most recently, Shared Diary was updated on September 24, 2026 and Tensei Algorithm on September 21, 2026.

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