100 Days After vs ONE Habit Tracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
100 Days After
Calculate the 100th day from any given date or celebrate anniversaries. Export calculated dates as events to your iPhone's calendar.
- Calculate 100th day from any date
- Celebrate anniversaries
- Export dates as calendar events
- New user interface
- New features
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Do you know which date is the 100th day of your first date? Would you like to celebrate an anniversary from an event? This app '100 days after' allows you to calculate a date from any given spot in the calendar. Calculated dates can be exported as an event and added to your iPhone's calendar. Download now and experience the whole new user interface and features of '100 days after'!
ONE Habit Tracker
This app helps you build lasting habits by focusing on mastering one at a time. It uses psychology-backed commitment periods, intelligent insights, and streak risk prediction to prevent failure and celebrate your wins.
- Master one habit at a time
- Commitment-based system (30, 60, 90 days)
- Streak risk prediction
- Mood tracking for trigger identification
- Visual streak counters and milestone celebrations
- Weekly analytics and progress reports
- Distraction-free interface with dark mode
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Build Life-Changing Habits That Actually Stick Stop failing at multiple habits and start succeeding with one. ONE Habit Tracker helps you build lasting habits through focused commitment and proven psychology - because mastering one habit at a time is the secret to lasting change. ACHIEVE REAL RESULTS WITH FOCUSED COMMITMENT Never lose momentum again. Our commitment-based system ensures you stay dedicated to your habit for 30, 60, or 90 days - the proven timeframe for lasting behavior change. When you graduate one habit, you'll have the confidence to tackle the next. STAY ON TRACK WITH INTELLIGENT INSIGHTS Know exactly where you stand. Your personal roadmap shows upcoming habits, weekly overviews reveal patterns, and advanced analytics help you understand what drives your success. Smart notifications keep you motivated without overwhelming you. PREVENT FAILURE BEFORE IT HAPPENS Break the cycle of broken streaks. Our streak risk prediction alerts you when you're most likely to skip a day, while mood tracking helps you identify emotional triggers that derail progress. Stay ahead of setbacks with data-driven insights. CELEBRATE EVERY WIN ALONG THE WAY Feel proud of your progress. Visual streak counters, milestone celebrations, and habit graduation ceremonies turn daily actions into meaningful achievements. Watch your confidence grow as you master each new habit. UNDERSTAND YOUR PATTERNS FOR LASTING SUCCESS Discover what makes you tick. Weekly analytics show your best completion times, mood correlations reveal optimal conditions, and detailed progress reports help you replicate success in future habits. SIMPLE, BEAUTIFUL, AND DISTRACTION-FREE Focus on what matters most. Our clean interface removes all distractions, letting you concentrate on your daily commitment. Dark mode, smooth animations, and accessibility features create an experience you'll love using every day. FREE FEATURES INCLUDE: • One active habit with daily tracking • Basic streak counting and progress visualization • Simple mood integration • Weekly calendar overview • Commitment period tracking • iCloud sync across all devices PREMIUM SUBSCRIPTION UNLOCKS: • Unlimited habit roadmap planning • Advanced analytics and insights dashboard • Streak risk prediction and early warnings • Detailed mood correlation analysis • Smart notification scheduling • Custom themes and personalization • Export and backup capabilities • Priority support Perfect for anyone serious about building better habits - whether you're starting your first habit or systematically improving every area of your life. Transform your life one habit at a time. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: ONE Habit Tracker at 5.0 against 100 Days After's 4.2. ONE Habit Tracker also leads on update cadence (every 2 months vs every 4 months). 100 Days After's advantage is in-app purchases (none vs 3) and ratings volume (6 vs 1). On price, ads and device support 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. ONE Habit Tracker sells 3 in-app purchases, starting at $3.99 per month. 100 Days After asks for nothing beyond the download.
ONE Habit Tracker holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: 100 Days After has 6 ratings behind it against 1, so its average is the more settled of the two.
100 Days After ships an update every 4 months, ONE Habit Tracker every 2 months. The most recent releases landed on October 23, 2026 and October 18, 2026 respectively.
| Parameter | 100 Days After | ONE Habit Tracker |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (6 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 62.5% of reviews | — |
| Number of ratings | 6 — better | 1 |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 9 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Broong, Inc. | Jeff Cedilla |
Customer experience
100 Days After
ONE Habit Tracker
In-app purchases
100 Days After
No in-app purchases
ONE Habit Tracker
- Monthly$3.991 Month
- Yearly$6.991 Year
- Lifetime$9.99
Questions
Is 100 Days After free?
Is ONE Habit Tracker free?
Which has better reviews, 100 Days After or ONE Habit Tracker?
Do 100 Days After or ONE Habit Tracker have ads?
Which is updated more often, 100 Days After or ONE Habit Tracker?
Other comparisons
