Know Your Lemons vs 75 Day Challenge
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Know Your Lemons
This app empowers users to take control of their breast health. It offers personalized risk assessment, monthly self-exam reminders, and educational tools to understand symptoms and prepare for screenings. Track your cycle and learn how to perform self-exams with confidence.
- Monthly self-exam reminders
- Personalized risk calculation
- Screening plan creation
- Audio self-exam guides
- Menstrual cycle tracking
- Learn 12 breast cancer symptoms
Read full descriptionHide full description
Don’t wait to find a breast problem before you learn about breast health! Earn your two lemons and become a Lemonista Confidence: Play games and follow guided lessons to learn how to do a breast self-exam. Intelligence: Complete the Tyrer-Cuzick risk assessment to learn about your personal risk and get a custom screening plan. Make it part of your health routine with monthly self-exam reminders, badges, tools to help you prepare for screening, and helpful guides on what to do if you find something. Created by the Know Your Lemons Foundation, winner of the 2025 Webby Award for Best Health, Wellness & Fitness app. As a charity, security and privacy are important to us. Data collection is to prevent losing information and to enable additional features. Your health data is securely stored, is not sold to third parties, and your account and its data can be deleted at any time.
75 Day Challenge
This app guides users through a 75-day program to build healthy habits and develop resilience. It focuses on consistency and sustainable change for both physical and mental wellness, offering a balanced approach to self-improvement.
- Build lasting healthy habits
- Stay motivated daily
- Visualize progress
- Home screen widgets (Premium)
- Customize challenge rules (Premium)
- Flexible scheduling
Read full descriptionHide full description
I originally built this app for myself, as a fitness enthusiast looking to rebuild healthy habits. After experiencing its positive impact, I refined it to help others achieve the same transformation. In just 75 days, you’ll build better habits, push your limits, and develop the resilience to tackle any goal. WHY THE 75 SOFT? - Achieve Lasting Change: Transform your daily routine and watch how small, consistent actions lead to big, lasting results. - Stay Motivated Every Day: It’s not just about crossing off tasks; it’s about creating momentum. With each day, you’ll feel more motivated to keep going. - Create Healthier Habits: From fitness to mental wellness, you’ll develop routines that set you up for long-term success—without overwhelming yourself. - Visualize Your Progress: Seeing how far you’ve come will inspire you to keep pushing forward, even on tough days. - Share Your Wins: turn any completed day into a beautiful sticker, add your own photo, and post your progress straight to your story. - Life Happens? Forgiving Mode keeps your challenge alive even when a day isn't perfect — progress over perfection. - Smart Daily Reminders: one gentle nudge at the time you choose. It skips days you've already completed and stops when your challenge ends. - Home Screen Widgets (Premium): Track and update your challenge directly from your Home Screen with interactive widgets. - Customize Your Challenge (Premium): Edit challenge rules and add up to 4 custom rules to tailor the challenge to your goals and make it uniquely yours. - Flexibility for Your Life: Choose your start date or adjust it later if needed, making it easier to fit the challenge into your schedule. If you’ve heard of the 75 Hard, you know how intense and demanding it can be. The 75 Soft offers a more balanced approach to self-improvement, focusing on consistency and sustainable habits without the extreme pressure. It’s perfect for those who want to challenge themselves but also value flexibility and long-term success. WHAT’S POSSIBLE? - A healthier, more focused you—both physically and mentally. - The confidence that comes with discipline and consistency. - The ability to stick to your goals, even when life gets in the way. - A sense of accomplishment that fuels your next big challenge. TAKE CONTROL OF YOUR JOURNEY Whether you're looking to improve your fitness, sharpen your mindset, or simply stay committed to personal growth, the 75 Soft helps you create the life you want—one day at a time. Your journey starts here. Download now and become the best version of yourself. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Know Your Lemons at none against 75 Day Challenge's 7. Know Your Lemons also leads on iOS requirement (15.0 vs 17.0). 75 Day Challenge's advantage is review sentiment (88% vs 77%) and ratings volume (412 vs 128). On price, rating, update cadence and ads 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. 75 Day Challenge sells 7 in-app purchases, starting at $3.99 per 7 days. Know Your Lemons asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.8 for Know Your Lemons against 4.7 for 75 Day Challenge. Both are backed by a comparable volume of ratings — 128 and 412 respectively. Written reviews are what separate them: 77% of Know Your Lemons's written reviews are positive against 88% of 75 Day Challenge's.
Know Your Lemons ships an update fortnightly, 75 Day Challenge every 3 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.
| Parameter | Know Your Lemons | 75 Day Challenge |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (128 ratings) — better | 4.7 (412 ratings) |
| Positive reviews | 77.1% of reviews | 88.2% of reviews — better |
| Number of ratings | 128 | 412 — better |
| Update frequency | Fortnightly — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 196 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Know Your Lemons Foundation Inc. | Inkolab |
Customer experience
Know Your Lemons
75 Day Challenge
User reviews
Know Your Lemons
From 128 App Store ratingsWhat we love
- 👍 Easy to use and navigate
- 💡 Informative and educational content
- 🚀 Helpful reminders for self-exams
- 🎨 Beautiful and engaging design
- ✅ Clear explanations of symptoms
Room to improve
- 🐛 Reminder notifications often inaccurate
- 🐛 Risk assessment quiz bugs/restarts
- 🐛 Data loss issues
- 🐛 Login problems/inability to re-enter
- 🐛 Outdated recurrence statistics
75 Day Challenge
From 412 App Store ratingsWhat we love
- 👍 Easy to use
- 🚀 Simple and straightforward
- 💡 Helpful for 75 Soft challenge
- 🤩 Motivating and keeps you on track
- 🌟 Cute and aesthetically pleasing design
Room to improve
- 🔍 Limited customization options
- 🚫 Premium version doesn't offer much value
- 🐛 Occasional app crashes
Bugs and requests
Know Your Lemons
Reported bugs
9 issues- Reminder notifications are consistently wrong (early or not sent)
- Risk assessment quiz restarts mid-quiz
- User data disappears after a period
- Unable to log back into the app after initial use
- Age selection in screening quiz is limited and buggy
Show 4 moreShow fewer
- Main screen content overlaps on some devices
- Incorrect website URL mentioned in video
- Notifications not received
- Login screen pop-up doesn't appear
Requested features
9 requests- Adjustable reminder timings for varying cycle lengths
- Reminders to stay on Lock Screen/icon badge
- More inclusive language for transgender individuals
- Inclusion of UK/global location data
- Update recurrence statistics with current data
Show 4 moreShow fewer
- More detailed risk assessment considering subtype and stage
- Fix for risk assessment quiz restarting
- Fix for data disappearing
- Fix for login issues and re-entry problems
75 Day Challenge
Reported bugs
2 issues- App crashes when trying to start the challenge
- Issues with the app on older iOS versions
Requested features
3 requests- Add ability to track additional daily goals
- Implement calendar view to see progress
- Allow recording of specific water intake amounts
In-app purchases
Know Your Lemons
No in-app purchases
75 Day Challenge
- Premium Access3 Days trial$3.997 Days
- Premium Access3 Days trial$4.997 Days
- Premium Access$14.991 Year
Show 2 moreShow fewer
- Premium Access$19.991 Year
- Premium Access$29.991 Year
- Unlock all features$4.99
- Unlock all features$34.99
Questions
Is Know Your Lemons free?
Is 75 Day Challenge free?
Which has better reviews, Know Your Lemons or 75 Day Challenge?
Do Know Your Lemons or 75 Day Challenge have ads?
Which is updated more often, Know Your Lemons or 75 Day Challenge?
Other comparisons















