OffDays Alarm vs Caffeine Level Tracker & Calc
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
OffDays Alarm
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OffDays Alarm helps you keep recurring alarms active without getting woken up on public holidays or your own custom off days. Choose a supported holiday region, add personal off days, and let the app automatically skip alarms when you do not need them. You can manage alarm time, repeat days, snooze, and labels in one place, making it a practical fit for work schedules, school days, medication reminders, and daily routines. Supported Off-Day Calendars: South Korea, United States, Canada, United Kingdom, Australia, Singapore, Japan, Taiwan, India, China, Hong Kong, Germany, France, Spain
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 update cadence: OffDays Alarm at every 10 days against Caffeine Level Tracker & Calc's every 2 months. Caffeine Level Tracker & Calc's advantage is iOS requirement (15.0 vs 26.0). 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. Neither carries in-app purchases, so what you see is what you pay.
OffDays Alarm ships an update every 10 days, Caffeine Level Tracker & Calc every 2 months. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.
| Parameter | OffDays Alarm | Caffeine Level Tracker & Calc |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 10 days β better | Every 2 months |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad, iPod β better |
| Requires iOS | 26.0 | 15.0 β better |
| Further details β not scored | ||
| Size | 15 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | Sung Ahn Kim | Seulki Eom |
In-app purchases
OffDays Alarm
No in-app purchases
Caffeine Level Tracker & Calc
No in-app purchases
Questions
Is OffDays Alarm free?
Is Caffeine Level Tracker & Calc free?
Do OffDays Alarm or Caffeine Level Tracker & Calc have ads?
Which is updated more often, OffDays Alarm or Caffeine Level Tracker & Calc?
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