Master One vs nu
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Master One
This app guides you in building habits by focusing on one at a time. You can set custom durations, track your progress and streaks, and review your completed habits. It offers a clean, distraction-free interface with options to archive or restart habits.
- One habit focus
- Custom habit durations
- Streak and history tracking
- Mastered habits archive
- Minimalist design
- Archive and restart habits
- Strict mode for perfect streaks
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Master One helps you focus on building habits one at a time. Set your own duration, track streaks, update your progress, and celebrate every success. Features: ◆ One Habit at a Time: Simplify your focus for better results. ◆ Custom Durations: Choose how long to work on each habit. ◆ Streak & History Tracking: Monitor progress, edit past entries, and stay on track. ◆ Mastered Habits: Reflect on your growth with a list of completed habits. ◆ Clean, Minimal Design: Beautiful, simple, and distraction-free. ◆ Archive & Restart – Pause habits anytime and pick them up later. ◆ Strict Mode – Only count progress with perfect streaks—no gaps allowed. ◆ Themes – Personalize your experience with different styles.
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 — 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 ads: nu at none against Master One's shown. nu also leads on device support (3 vs 1). On price, update cadence, in-app purchases and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Master One 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.
Master One ships an update every 2 months, nu monthly. The most recent releases landed on October 10, 2026 and October 4, 2026 respectively.
| Parameter | Master One | nu |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 months | Monthly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Mary Ogawa | Dahye Yu |
In-app purchases
Master One
- LIFE_PURCHASE$0.99
nu
- Premium Lifetime$4.99









