Know Your Lemons vs MammoScreen
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
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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.
MammoScreen
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The MammoScreen lite app brings together a range of resources developed by the MammoScreen Consortium as well an overview of the MammoScreen Horizon 2020 project, funded by the EU and UK Government.
Screenshots
Verdict
Know Your Lemons and MammoScreen are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Neither carries in-app purchases, so what you see is what you pay.
Know Your Lemons ships an update fortnightly, MammoScreen monthly. The most recent releases landed on October 13, 2026 and October 6, 2026 respectively.
| Parameter | Know Your Lemons | MammoScreen |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (125 ratings) — better | — |
| Positive reviews | 77.1% of reviews | — |
| Number of ratings | 125 — better | — |
| Update frequency | Fortnightly — better | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 196 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Know Your Lemons Foundation Inc. | Elaros |
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
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- 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
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- 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
MammoScreen
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Know Your Lemons
No in-app purchases
MammoScreen
No in-app purchases
Questions
Is Know Your Lemons free?
Is MammoScreen free?
Do Know Your Lemons or MammoScreen have ads?
Which is updated more often, Know Your Lemons or MammoScreen?
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