100 Days Tracker vs Caffeine Level Tracker & Calc
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
100 Days Tracker
This app helps you build lasting habits by tracking your daily progress on up to 100-day challenges. Customize your goals with themes and layouts, and share your achievements. Widgets offer at-a-glance progress updates.
- Track multiple 100-day challenges
- Home screen widgets for progress
- Customizable color themes
- Grid and overview layouts
- Share progress snapshots
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Set a goal. Track 100 days. Build a habit that sticks. 100 Days Tracker helps you commit to your goals by tracking daily progress over 100 days. Whether it's fitness, learning, creativity, or personal growth โ create a challenge, tap each day as you go, and watch your consistency build. Now with multiple challenges and Home Screen widgets, staying on track has never been easier. TRACK MULTIPLE GOALS AT ONCE - Pro Feature Create separate 100-day challenges for everything you want to achieve. Learn a language, exercise daily, read more, practice an instrument โ run them all side by side. HOME SCREEN WIDGETS - Pro Feature Add widgets to your Home Screen to check progress and mark days complete at a glance โ no need to open the app. MAKE IT YOURS โข Choose from vibrant colour themes for each challenge โข Switch between detailed grid and 100-day overview layouts โข Toggle animations and background gradients SHARE YOUR PROGRESS Proud of your streak? Share a snapshot of your progress grid with friends and family. 100 DAYS PRO LIFETIME Unlock unlimited challenges. Use Widgets to monitor and update at a glance. Existing users who started before Pro was introduced get Pro access for free. Start your first 100-day challenge today. Family Sharing Enabled.
Caffeine Level Tracker & Calc
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Caffeine Tracker: Real-Time Half-Life & Sleep Cutoff Calculator Love your daily coffee, espresso, or energy drinks, but worried about caffeine staying in your body at bedtime? Caffeine Tracker is your smart personal caffeine manager. By applying scientific caffeine clearance half-life equations (approx. 5-hour half-life), it calculates your real-time body caffeine level, predicts when caffeine will completely clear, and provides a sleep cutoff time to protect your sleep quality. Key Features 1. Real-Time Body Caffeine & Clearance Estimator: Track how much caffeine remains in your system right now and see the exact estimated time when it will be fully metabolized. 2. Sleep Cutoff Time Calculator: Input your target bedtime (e.g., 11:00 PM) to get your personalized latest safe caffeine intake time so you can fall asleep soundly. 3. Daily Intake Limit Warning: Monitor today's total caffeine intake against recommended daily limits (e.g., 400 mg for healthy adults) with instant warning alerts. 4. Quick Presets & Custom Entries: Quickly log Espresso, Americano, Latte, Energy Drinks, Cola, Green Tea, or add your own custom drink sizes and milligrams. 5. Calendar History & Intake Trends: Review your past caffeine consumption history on a visual calendar to build healthier coffee habits. Recommended For - Coffee lovers, students, and professionals who want to enjoy caffeine without sacrificing sleep. - Anyone experiencing insomnia, anxiety, or restlessness from afternoon coffee or energy drinks. - Health-conscious individuals monitoring daily caffeine limits (adults 400mg, pregnant women 200mg). Download Caffeine Tracker today and enjoy your favorite drinks while sleeping soundly!
Screenshots
Verdict
The clearest difference is in-app purchases: Caffeine Level Tracker & Calc at none against 100 Days Tracker's 1. Caffeine Level Tracker & Calc also leads on iOS requirement (15.0 vs 17.6). 100 Days Tracker's advantage is ads (none vs shown). On price, update cadence and device support 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. 100 Days Tracker sells 1 one-off in-app purchase. Caffeine Level Tracker & Calc asks for nothing beyond the download.
100 Days Tracker ships an update every 6 weeks, Caffeine Level Tracker & Calc every 2 months. The most recent releases landed on October 10, 2026 and October 13, 2026 respectively.
| Parameter | 100 Days Tracker | Caffeine Level Tracker & Calc |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | โ |
| Update frequency | Every 6 weeks โ better | Every 2 months |
| Ads | No โ better | Yes |
| In-app purchases | Yes | No โ better |
| Monetization | Free | โ |
| Devices | iPhone, iPad | iPhone, iPad, iPod โ better |
| Requires iOS | 17.6 | 15.0 โ better |
| Further details โ not scored | ||
| Size | 11 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | Chad Goodyear | Seulki Eom |
In-app purchases
100 Days Tracker
- Pro Lifetime$6.99
Caffeine Level Tracker & Calc
No in-app purchases
Questions
Is 100 Days Tracker free?
Is Caffeine Level Tracker & Calc free?
Do 100 Days Tracker or Caffeine Level Tracker & Calc have ads?
Which is updated more often, 100 Days Tracker or Caffeine Level Tracker & Calc?
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