Dayfly vs Prubi
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Dayfly
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Dayfly is for notes you only need for a little while. Notes quietly disappear after 24 hours by default. Parking spots, Wi-Fi passwords, locker numbers, today-only reminders β jot it down and forget about it. Dayfly cleans up after itself. Attach photos and videos too. That whiteboard, a receipt, a photo you only took to ask an AI about β capture it and share it straight from Dayfly. Dayfly-managed attachments are removed when an expired note is cleaned up. Photo-library originals and shared copies remain. Want to keep something? One star makes a note permanent. β’ No account, no sign-up β open and write β’ Stored on your device, with no account or cloud sync β’ No ads, no tracking β’ Minimal design, dark by default Dayfly Pro (lifetime Β· one-time purchase): β’ Multiple photos + video attachments (free: one photo per note) β’ Per-note expiry β from 1 hour to 7 days, or forever β’ Lock Screen widget with your latest note and time left β’ Action Button & Siri quick capture (Control Center capture is free) β’ Notes fade out as they near expiry β’ Extra themes Not a subscription. Buy once, yours for life. Expired notes are hidden; stored data is cleaned up when the app is active. Device backups may include notes and attachments. Shared copies and originals in your photo library are not deleted when a Dayfly note expires.
Prubi
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Prubi β the AI notes app that gets prettier as you write. One line becomes a plan, and Prubi reminds you before you forget. A line a day, in Korean β write one line about your day and see it as natural Korean phrases: the sentence, how it sounds, and what each part means. Listen, read along, then hide it and write it in Korean yourself. WHY YOU'LL WANT TO OPEN IT β’ Share as one card, no link β today's line turns into a picture card. Anyone can read it, even without the app. β’ 16 pixel friends β as your writing days add up, a new friend drops by and walks along the bottom of the screen. Can you collect them all? β’ A desk that grows with you β 28 papers, tapes, props and friends to decorate every day, nothing to buy. β’ One line is enough β no long entries, and skipping a day is fine. Start light with 7 Days of Gratitude. EVERYDAY PROBLEMS, MADE EASY β’ Jot it before it slips away β write straight from Home. No folder to pick first. β’ Notes become plans β write one line, tap "Let Prubi sort this", and the date and time land on your calendar. β’ Check it, color it, remind me β checklists, 6 colors and reminders. β’ Your week at a glance β weekly planner, a 24-hour day view and D-day. β’ "Where did I write that?" β ask, and the AI finds it in your own notes and shows exactly which notes it read. BUILT TO TRUST, BUILT TO LAST β’ A vault only you can open β passwords, account numbers and ID photos are encrypted on your device before upload; the server keeps only ciphertext. β’ Write on your phone, continue on PC β same account, same notes on phone, PC and tablet. β’ 16 languages Β· no ads Β· no data selling Β· your notes are not used to train AI models. β’ Export notes to Word, PDF or Excel, and delete your account any time. START WITH ONE LINE TODAY Create your free account now β every line you write is saved to it, so nothing is lost even if you change phones. Free to start. When you want to go deeper, continue with an annual or lifetime plan inside the app. On a computer, pick up right where you left off at prubi.online with the same account. Made by Gonggansai
Screenshots
Verdict
The clearest difference is update cadence: Prubi at every 3 days against Dayfly's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Dayfly sells 1 one-off in-app purchase and Prubi sells 3 in-app purchases, starting at $29.99 per year. Whichever you choose, the download price is not the number that matters.
Dayfly ships an update fortnightly, Prubi every 3 days. The most recent releases landed on November 10, 2026 and November 6, 2026 respectively.
| Parameter | Dayfly | Prubi |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly | Every 3 days β better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone |
| Requires iOS | 17.0 | 16.4 β better |
| Further details β not scored | ||
| Size | 1 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | Yohan Gwak | Teawoong Kim |
In-app purchases
Dayfly
- Mayfly Pro$3.99
Prubi
- Premium Annual$29.991 Year
- Prubi Real Native1 Month trial$49.001 Month
- Premium Lifetime$109.99









