Commaday vs QuestionDiary
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Commaday
This app helps you build a journaling habit by encouraging you to write just one sentence a day. It offers daily prompts and a unique 'comma' system to maintain streaks, even if you miss a day. Your entries are stored locally on your device for privacy.
- One-sentence daily entries
- Daily themes and keywords
- Streak tracking with 'commas'
- Calendar view of entries
- Local device storage
- Google Drive backup option
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A note first: the app's interface is entirely in Korean. There is no English UI yet. If you read Korean comfortably โ or you're learning and want the immersion โ it works as-is. I'd rather you know before installing. Inside the app you'll see its Korean name, ๋์์ฅ์จ. How many journals have you started and left behind? Commaday is a diary built around one line a day. Too long to write, too imperfect to post, so you put it off โ this app starts from the smallest habit instead. โ One line a day One sentence is enough. You can attach a photo if you want. On days when nothing comes to mind, a prompt is waiting: 66 sentence prompts and 60 words run on separate cycles, so a given pairing takes nearly two years to come back. You can ignore both and write freely. If you'd like, a quiet reminder arrives each night at a time you choose. You can change it in settings. โ The comma that keeps you going Write daily and your streak builds. Every seven days you earn a comma, and you can hold up to two. If you're running low, you can earn one by watching a single ad. Take a day off and a comma fills it in for you. And if a streak does end, every entry you wrote stays exactly where it is โ nothing is deleted, and nothing counts down to a next goal. โ Your time, gathered on a calendar The days you wrote are joined by a golden thread across the calendar. Look back after a month and the single lines have quietly become a story. โ Your writing stays on your phone No account, no sign-up, no server of mine. Everything is stored on your device. An optional Google Drive backup lets you move your entries and photos to a new phone. โ Premium (optional) ยท All 3 ways in one day โ Freeform, Sentence, Word ยท 3 photos per entry ยท Write your own prompts and keep them ยท Export as PDF โ each month on one calendar cover A one-time purchase. The free way you've been writing stays exactly as it is. Tonight, just one line.
QuestionDiary
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QuestionDiary asks you one question a day. Answer it in a few lines, and one year later, on the same date, meet the person who wrote it. โ One question a day Every morning a question arrives: "What made you smile today?" A few lines are enough. Questions are tied to the calendar date, so the same question returns on the same day each year. 366 questions across eight themes (self, relationships, daily life, memories, feelings, dreams, growth, gratitude) are built in, and you can swap any of them for your own or one from the Plaza. โ A year later, your answer comes back When the same date comes around, the answer you wrote appears again on today's screen. After two or three years you see every year's answer to the same question side by side. Swapping a question later never changes what you already wrote. โ Journal Look back through a calendar and a timeline, search your answers, and track your streak and how much of the year you've filled. โ Plaza A place where people post questions they'd like to ask each other. Bring any of them into your own diary. Posts show no names or identifiers, and you can report or block. โ Only on your device Answers stay on this iPhone by default. Start without an account or email. Turn on Backup only if you want it, then a single 10-character code moves everything to a new device. Lock the diary with Face ID. โ Reminders Get the day's question once, at the time you choose. If you've already answered before then, that day's reminder stays quiet. You'll also hear when an answer from a year ago arrives. Ads, but no tracking: the app never asks for tracking permission, and your diary is never used for analytics. Privacy Policy: https://api.hanilsoft.net/questiondiary/privacy/ Terms of Use: https://api.hanilsoft.net/questiondiary/terms/
Screenshots
Verdict
The clearest difference is in-app purchases: QuestionDiary at none against Commaday's 1. On price, ads, device support and iOS requirement 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
Both are free to download. Commaday sells 1 one-off in-app purchase. QuestionDiary asks for nothing beyond the download.
| Parameter | Commaday | QuestionDiary |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | โ |
| Update frequency | Every 9 days | โ |
| Ads | Yes | Yes |
| In-app purchases | Yes | No โ better |
| Monetization | Ad-supported | โ |
| Devices | iPhone | iPhone |
| Requires iOS | 16.4 โ better | 17.0 |
| Further details โ not scored | ||
| Size | 78 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | WonHyeong Chang | GAGASOFT |
In-app purchases
Commaday
- Premium - All 3 Ways in one day$9.99
QuestionDiary
No in-app purchases









