Day75 vs KcalCulator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Day75
This app guides users through a 75-day challenge focused on building discipline and mental toughness. It provides tools to track daily tasks like workouts, diet, water intake, and reading, with options for custom challenges and progress visualization.
- Daily task checklist
- Smart countdown timer
- Water intake tracker
- Reading log
- Progress photo journal
- Challenge analytics
- Custom challenge durations
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A 75-day mental toughness challenge that transforms your discipline one day at a time. This isn't about motivation—it's about keeping promises to yourself. Track your journey with an app that keeps you accountable. Complete two 45-minute workouts (one outdoors), follow your chosen diet, drink a gallon of water, read at least 10 pages, and take a progress photo. Every single day, for 75 days. CORE FEATURES - Daily checklist for all 6 tasks - Smart countdown timer to your daily reset - Water intake tracker (128 oz daily goal default) - Reading log with book title and page counter - Progress photo journal with side-by-side comparisons - 75-day calendar with monthly and weekly views - Daily reminders, milestone alerts, and streak notifications - Challenge variants: Hard, Medium, and Soft modes - Daily notes to journal your progress - Challenge analytics and completion stats - Share your achievements with custom progress images PREMIUM FEATURES - Cloud photo backup and sync across devices - Up to 5 photos per day - Custom challenge durations - Create your own challenge rules and tasks - Edit previous day entries - Adjust start dates retroactively - Photo timelapse generation with export options - Health snapshot and trends dashboard - Export challenge data (CSV format) - Downloadable PDF completion certificate - Unlimited grace periods for missed days - Unlimited challenge history - Access to community workout links - Group challenges with friends THE CHALLENGE: - Two 45-minute workouts daily (one must be outdoors) - Follow a diet of your choice (no cheat meals, no alcohol) - Drink 1 gallon (128 oz) of water - Read at least 10 pages of a non-fiction book (no audiobooks) - Take a daily progress photo - Miss any task? Restart from Day 1 Built for those who understand that discipline isn't negotiable. Whether you're tackling the full 75 days in Hard mode, easing in with Medium or Soft mode, or building a completely custom challenge—this app tracks every task, logs every check mark, and holds you accountable when it's easier to quit. PERFECT FOR: - Building consistent daily habits - Mental toughness training - Fitness transformations - Accountability partners - Challenge communities - Personal development journeys Track your water intake, log your reading, store your progress photos, generate a time-lapse of your transformation, and watch your discipline compound—one day at a time. This app won't motivate you. It'll just show you exactly where you stand. The rest is up to you. Ready to commit? Download now and start your 75-day transformation. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://day75.com/privacy/
KcalCulator
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KcalCulator is a calm, beautiful way to track what you eat — built to stay out of your way and keep your data on your device. SCAN LABELS WITH YOUR CAMERA Point the camera at any nutrition label (English or Spanish). On-device text recognition fills in calories, protein, carbs, fat and more — no typing, no cloud. YOUR PANTRY, PHOTOGRAPHED Snap a product and Cal Culator cuts out the background automatically, turning your real food into the interface. Your most-used products live in a Frequent rail: logging a repeat meal is one tap. DISHES YOU ALWAYS MAKE Save a finished meal — photo plus the exact amounts you always use. Add the whole dish to your day in one tap; every ingredient is logged with its own values. A DAY AT A GLANCE A goal ring, three macro beams and a short note show where you stand. The ledger groups your day by meal, in a warm, paper-like design with serif numerals. HISTORY THAT'S HONEST A month calendar shows how each day went: green when you landed near your goal, amber when you were close, red when you were far — over or under. PRIVATE BY DESIGN No account. No ads. No analytics. No internet connection at all — everything is computed and stored on your iPhone. App Privacy: Data Not Collected. Cal Culator estimates figures from the data you enter and is not a substitute for professional medical or nutritional advice.
Screenshots
Verdict
The clearest difference is in-app purchases: KcalCulator at none against Day75's 2. KcalCulator also leads on ads (none vs shown). On price, device support 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. Day75 sells 2 in-app purchases, starting at $3.99 per month. KcalCulator asks for nothing beyond the download.
| Parameter | Day75 | KcalCulator |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 2 weeks | — |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, Apple Watch — better | iPhone |
| Requires iOS | 16.4 — better | 17.0 |
| Further details — not scored | ||
| Size | 117 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | OKCOKER LLC | Zertyn LLC |
In-app purchases
Day75
- Day75 Monthly7 Days trial$3.991 Month
- Day75 Yearly7 Days trial$29.991 Year
KcalCulator
No in-app purchases









