Comparison

Inkline vs Solo Diary

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

Head to head
About

Inkline

Record a single line of your day to create a lasting journal. Review past entries from previous years on the same date, with optional features like iCloud sync and custom themes available through a one-time purchase.

Highlights
  • One line daily entry
  • Weather icon addition
  • Historical date review
  • Home screen widget
  • Daily reminders
  • No ads or sign-in
  • Export to text
Features
Read full description

One line a day. That's all. What you write tonight will be waiting for you next year, on this very day. The more you write, the more of your past todays come back to meet you. ใ€WRITEใ€‘ Ten seconds. - One line for today - No save button. Your words are kept as you type - Add a small weather icon: the sky outside, or your mind - Missed a day? A blank line is a record of its own ใ€READใ€‘ Your todays gather. - Today's page quietly collects the same date from last week, last month, last year, and the years before - Lays every year of one date on a single page - A calendar and search bring any day back in a moment ใ€TOUCHใ€‘ without opening. - A widget leaves "a year ago today" on your Home Screen - One reminder a day, at the hour you choose. Never more - Night owls: until 3 AM, it still counts as today ใ€KEEPใ€‘ Your words are yours. - No ads. Ever - No account, no sign-in - Export as text anytime, free. Your diary is never held hostage ใ€INKLINE PROใ€‘ - one time purchase - No monthly anything. Pay once, keep it - iCloud sync - the same page on iPhone, iPad, and Mac - Themes and app icons - A PDF book of your years From the smallest of daily records, one day you'll feel how far you've come.

About

Solo Diary

Features
Read full description

Solo Diary replaces the habit of opening social media with a timeline that's only yours. โ–  No one can see it No followers, no public posts, no like counts. What you write here is yours alone. Instead of comparing yourself to others, you face only your past self. โ–  Instead of likes, a word from an AI When you post, an AI leaves a short comment. Choose from three personalities โ€” Empathetic, Witty, or Matter-of-fact. AI comments are optional; every feature still works with them off. When on, only your note's text is sent to generate a comment. Photos are never sent. โ–  Your past self, returning "A month ago / a year ago today" surfaces at the top of your timeline, so you can gently reread how you felt back then. โ–  Quiet by design A dark theme. No red notification badges, and no endless scroll โ€” a finite timeline you can actually finish. โ–  In your language Available in English, Japanese, Chinese, Korean, and Spanish. The app follows your device language, and the AI replies in your language too. No account needed. Your data stays on your device and can be deleted anytime. Free to use (ads support the AI feature). Prefer no ads? A one-time "Remove ads" purchase hides them all.

Screenshots

Inkline4 screens
Solo Diary4 screens

Verdict

The call

The clearest difference is in-app purchases: Solo Diary at none against Inkline's 1. Solo Diary also leads on iOS requirement (15.0 vs 17.0). Inkline's advantage is ads (none vs shown). On price, update cadence and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Inkline sells 1 one-off in-app purchase. Solo Diary asks for nothing beyond the download.

UpkeepUpdate frequency

Inkline ships an update monthly, Solo Diary every 6 weeks. Both last shipped on October 31, 2026.

Scorecard3 real differences ยท 5 level
Inkline versus Solo Diary: the parameters behind the verdict, then further details
ParameterInklineSolo Diary
PriceFreeFree
Positive reviews100.0% of reviewsโ€”
Update frequencyMonthly โ€” betterEvery 6 weeks
AdsNo โ€” betterYes
In-app purchasesYesNo โ€” better
MonetizationFreemiumโ€”
DevicesiPhone, iPad, Mac โ€” betteriPhone, iPod
Requires iOS17.015.0 โ€” better
Further details โ€” not scored
Size10 MB28 MB
Age rating4+12+
DeveloperKouki YamashitaSae Ueno

In-app purchases

1 purchases

Inkline

One-time1
  • Inkline Pro$5.99
None

Solo Diary

No in-app purchases

Questions

Is Inkline free?
Inkline is free to download, with in-app purchases available.
Is Solo Diary free?
Solo Diary is free to download, with no in-app purchases.
Do Inkline or Solo Diary have ads?
Solo Diary shows ads; Inkline does not.
Which is updated more often, Inkline or Solo Diary?
Inkline ships an update monthly, and Solo Diary every 6 weeks. Most recently, Inkline was updated on October 31, 2026 and Solo Diary on October 31, 2026.

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