Dayfly vs nu
Price, ratings, monetisation and update history for both apps, side by side ā 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 ā 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 ā 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. ⢠No account, no sign-up ā open and write ⢠Stored on your device, with no account or cloud sync ⢠No ads, no tracking ⢠Minimal design, dark by default Dayfly Pro (lifetime Ā· one-time purchase): ⢠Multiple photos + video attachments (free: one photo per note) ⢠Per-note expiry ā from 1 hour to 7 days, or forever ⢠Lock Screen widget with your latest note and time left ⢠Action Button & Siri quick capture (Control Center capture is free) ⢠Notes fade out as they near expiry ⢠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.
nu
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nu. is a 5-second, one-line journal built for ADHD brains and anyone who loses their train of thought mid-task. It's based on interstitial journaling: instead of trying to remember your whole day at night, you capture the small transitions between tasks as they happen. What did you just finish? What is the next tiny step? That's it. Most journaling apps demand long paragraphs you don't have time to write. nu. asks just those two questions. Type one sentence, tag your mood, and get back to your focus in 5 seconds. WHY NU. WORKS ⢠Built for Task-Switching: Designed for brains that lose the thread every time they change tasks. ⢠Zero Friction: Open, type, done. No blank-page anxiety. ⢠Automatic Timestamps: A clear visual timeline of your day, built effortlessly. ⢠Mood Tracking: Spot your energy and emotion patterns over time. ⢠Zero Distractions: No streak guilt, no social feeds, no noisy notifications. PREMIUM (One-Time Purchase ā No Subscription) ⢠Unlimited Calendar Archive: Revisit any past day. ⢠Minimalist Custom Themes: Match your personal aesthetic. nu. gives your scattered mind a quiet place to land, one moment at a time.
Screenshots
Verdict
The clearest difference is update cadence: Dayfly at fortnightly against nu's monthly. nu's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. Dayfly sells 1 one-off in-app purchase and nu sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Dayfly ships an update fortnightly, nu monthly. The most recent releases landed on October 15, 2026 and October 4, 2026 respectively.
| Parameter | Dayfly | nu |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly ā better | Monthly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone, iPad, iPod ā better |
| Requires iOS | 17.0 | 15.0 ā better |
| Further details ā not scored | ||
| Size | 1 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Yohan Gwak | Dahye Yu |
In-app purchases
Dayfly
- Mayfly Pro$3.99
nu
- Premium Lifetime$4.99









