Comparison

OneLine vs One

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

Head to head
About

OneLine

Features
Read full description

One line. Every day. Your story. OneLine is the beautifully simple journal that helps you capture each day in a single sentence. No pressure, no long-form writing, just one meaningful line that captures your moment. DAILY JOURNALING, SIMPLIFIED - Write one line per day (up to 280 characters) - Track your mood with five expressive moods - Attach photos to preserve visual memories - Daily writing prompts to spark inspiration MISSED A DAY? WRITE IT ANYWAY - Open any past day and fill it in later - A day you forgot is never locked away - Filling a gap puts your streak back together - Free, because writing in your own diary should be TRACK YOUR JOURNEY - Build writing streaks and stay consistent - See at a glance which days you journaled - Tap any day to open it right from your stats - See mood trends and patterns over time - On This Day: rediscover entries from past years YEAR IN REVIEW - Beautiful, interactive annual summary - Mood charts, writing activity graphs, and more - Tap any chart for detailed insights - Share your Year in Review as an image YOUR DATA, YOUR PRIVACY - Entries stay on your device and sync privately - Export your journal anytime as PDF or text - No ads, no tracking, no data collection - Lock your journal with biometric authentication (Premium) PREMIUM (One-time purchase, yours forever) - Photo memories on every entry - Biometric app lock - Streak shield: covers one forgotten day a month - Support independent development Everything else stays free: unlimited entries, filling in days you missed, search, export, activity map, Year in Review, On This Day, mood tracking, stats and cloud sync. Start your one-line-a-day habit today. It takes 30 seconds, but the memories last forever. --- Privacy Policy & Terms of Use: https://merzkevin.de/privacy-OneLine.html

About

One

This app simplifies journaling by requiring only one sentence per day. It's designed for beginners and busy individuals, offering a calm and focused space to capture daily thoughts and build a reflective habit effortlessly.

Highlights
  • One sentence daily entry
  • Effortless habit building
  • No overwhelm or distractions
  • Timeline of thoughts
  • Record of daily life
  • Calm and focused design
Features
Read full description

Start journaling without the pressure. Most journals ask too much. Blank pages. Long entries. Endless consistency. One is different. Write just one sentence a day — and you’re done. Why it works • No overwhelm — just a single sentence • Takes less than a minute • Builds a daily habit effortlessly • Capture your life as it happens Look back on your life Over time, your entries become something powerful: A timeline of your thoughts A record of your days A simple way to remember what matters Designed to feel calm and focused No clutter. No distractions. Just you and your thoughts. Perfect for • Beginners who can’t stick with journaling • Busy people with no time • Anyone who wants to reflect without pressure Simple. Intentional. Done. One sentence is all it takes. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

OneLine4 screens
One4 screens

Verdict

The call

OneLine and One are too close to call on the numbers: across 8 compared parameters — price, rating, ratings volume and update cadence among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. OneLine sells 1 one-off in-app purchase and One sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for OneLine against 5.0 for One. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

UpkeepUpdate frequency

OneLine ships an update every 10 days, One every 2 weeks. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.

ScorecardNo meaningful differences
OneLine versus One: the parameters behind the verdict, then further details
ParameterOneLineOne
PriceFreeFree
Rating5.0 (1 ratings)5.0 (2 ratings)
Number of ratings12 — better
Update frequencyEvery 10 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size3 MB1 MB
Age rating4+4+
DeveloperKevin MerzRyan Bittorf

In-app purchases

1 purchases

OneLine

One-time1
  • Premium$2.99
3 purchases

One

Subscriptions2
  • One Sentence Journal Premium$2.991 Month
  • One Sentence Journal Premium$14.991 Year
One-time1
  • One Sentence Journal Premium$34.99

Questions

Is OneLine free?
OneLine is free to download, with in-app purchases available.
Is One free?
One is free to download, with in-app purchases available.
Which has better reviews, OneLine or One?
OneLine and One are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.
Do OneLine or One have ads?
Neither OneLine nor One shows ads.
Which is updated more often, OneLine or One?
OneLine ships an update every 10 days, and One every 2 weeks. Most recently, OneLine was updated on October 24, 2026 and One on October 6, 2026.

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