My Derm vs Built By Karl
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
My Derm
This app helps individuals manage inflammatory skin conditions by tracking symptoms, medications, and lifestyle factors. It provides access to reliable health news, educational resources, and direct messaging with hospital teams if available. Users can also link health data from other apps to gain insights into their condition.
- Personal health record
- Medication and appointment reminders
- Health newsfeed
- Educational library
- Hospital team messaging
- Symptom and lifestyle tracking
- Apple Health/Google Fit integration
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My Derm is a free app that has been developed by experts to help people with inflammatory skin conditions live happier, healthier lives. JOIN FOR FREE & GAIN SUPPORT IN THE SELF-MANAGEMENT OF YOUR CONDITION: Personal health record: Maintain a record of your health, operations and tests to share with your clinical team. Reminders for medications and appointments: Schedule notifications to keep on top of your care. Newsfeed: Access trustworthy and relevant news relating to the inflammatory skin community. Library: Learn more about living with an inflammatory skin condition from BAS (British Association of Dermatology) and more. Message your hospital team: You can receive and send messages with your hospital team if your hospital is signed up! If your hospital is not yet signed up, let your clinical team know that you would like My Derm to be implemented in your hospital. Link your Apple Health or Google Fit: You can choose to link your data from the Apple Health app or Google Fit to share with your clinical team for read-only access. This will help you develop insights into how your lifestyle impacts your condition. Track your symptoms: Keep track of your symptoms and flares so that you can discover patterns in your health and habits. Doing so will help you to prolong periods of remission and reduce instances of relapse. You can also track your: Diet Exercise Pain Sleep Mood Stress Coming soon - Expert-led Courses! Build better habits with condition specific courses relating to sleep, medication, and wellbeing. Try single day activities or courses up to 28 days in length! OUR MESSAGE TO YOU: We know that living with an inflammatory skin condition can sometimes be difficult, lonely or tiring. It’s not always easy to manage symptoms during flare ups or know what steps to take to build a stronger wellbeing when you’re in remission. We’re a social-impact focused company, founded by patients and clinicians who are committed to improving the health and wellbeing of those with long-term inflammatory conditions. We believe that each individual deserves proper and accessible care to support their journey. We aim to provide you with practical tools and advice that can help you better track, manage and improve your health and wellbeing in the long-term. We hope that by joining our community, you gain more confidence in the self-management of your condition, alongside your regular clinical care. Find out more about My Derm: https://ampersandhealth.co.uk/myderm Join our online community! Instagram: www.instagram.com/ampersand_health www.facebook.com/ampersandhealthfb Twitter:www.twitter.com/myamphealth Have a question for us? Get in touch with us at info@ampersandhealth.co.uk
Built By Karl
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Built By Karl is a fitness and lifestyle coaching app designed to help busy men build strength, lose body fat, and create sustainable habits alongside work and family life. The app provides structured training programs, simple nutrition guidance, and daily accountability tools to support long-term consistency. Users can follow workouts tailored to their goals, track progress over time, and stay organised with habit tracking and check-ins. Key features include: Personalised workout plans with exercise demonstrations Progress tracking for workouts, body metrics, and habits Nutrition guidance and food tracking support In-app messaging for communication and feedback Goal setting and reminders to support consistency Built By Karl focuses on practical routines that fit around real life, helping users stay consistent without extreme diets or complicated systems. Everything is delivered in one place to make fitness simple, structured, and manageable. *App access requires a paid coaching plan. Terms Of Use: https://kahunas.io/terms-conditions Privacy Policy: https://kahunas.io/privacy Medical Disclaimer: This app does not provide medical advice, diagnoses, or treatment. The information and guidance provided within the app are for general fitness and wellbeing purposes only. Always seek the advice of your physician or other qualified healthcare provider before starting any exercise program, changing your nutrition, or making decisions regarding your health.
Screenshots
Verdict
The clearest difference is in-app purchases: My Derm at none against Built By Karl's 1. My Derm also leads on update cadence (every 5 weeks vs every 3 months) and iOS requirement (13.0 vs 15.0). On price, ads and device support 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. Built By Karl sells 1 in-app purchase, starting at $299.99 per month. My Derm asks for nothing beyond the download.
My Derm ships an update every 5 weeks, Built By Karl every 3 months. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.
| Parameter | My Derm | Built By Karl |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 5 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 126 MB | 56 MB |
| Age rating | 12+ | 17+ |
| Developer | AMPERSAND HEALTH LIMITED | Karl Jardine |
In-app purchases
My Derm
No in-app purchases
Built By Karl
- Monthly 1-1$299.991 Month
Questions
Is My Derm free?
Is Built By Karl free?
Do My Derm or Built By Karl have ads?
Which is updated more often, My Derm or Built By Karl?
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