KidneyWatch vs Magic Kidney
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
KidneyWatch
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You just got your lab results back. Your phosphorus is high. But phosphorus isn't even on the nutrition label. How are you supposed to track what you can't see? Generic nutrition apps track calories. They can't spot hidden phosphate additives in your deli meat. They can't tell you the banana in your smoothie just pushed you over your daily potassium limit. KidneyWatch was built for this. SCAN ANY FOOD, GET CONDITION-SPECIFIC FLAGS Point your camera at a meal, a label, or a barcode. KidneyWatch flags potassium, phosphorus, sodium, and protein against your daily limits using data from trustworthy sources. PHOSPHORUS DETECTIVE Phosphorus is the hardest nutrient to track in CKD. It's not required on labels, it hides in additives, and not all phosphorus is absorbed equally. KidneyWatch scans ingredients for 16 categories of hidden phosphate additives, adjusts for bioavailability (plant ~30% absorbed vs. additives ~95%), applies category-specific P:protein ratios, and flags missing data when the numbers don't add up. LIMITS SET TO YOUR STAGE Enter your CKD stage, body weight, and comorbidities. KidneyWatch calculates your limits from NKF KDOQI and KDIGO guidelines. Every flag links to the guideline it's based on. Tap any citation to check our work. DAILY DIARY WITH SWAP SUGGESTIONS Log meals and see where you stand. Color-coded bars track the four nutrients that matter most in kidney conditions. When your phosphorus runs high, KidneyWatch suggests lower-P swaps backed by NKF and DaVita guidelines. YOUR DATA STAYS ON YOUR DEVICE No account required. Your food diary and health information never leave your device. Whether you're adjusting to a renal diet or helping a family member navigate what to eat, KidneyWatch gives you what you need. Start your free 7-day trial today. KidneyWatch is not medical advice. Always consult your nephrologist or renal dietitian before changing your diet. Questions? support@kidneywatch.app Privacy: https://kidneywatch.app/privacy Terms: https://kidneywatch.app/terms
Magic Kidney
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One photo of your meal is all it takes. Magic Kidney's AI estimates sodium, potassium, phosphorus, and protein, then compares them to the limits for your CKD (chronic kidney disease) stage. What makes it different β it's built on Korean foods and the Ministry of Food and Drug Safety (MFDS) nutrition database, tuned for Korean meals from kimchi stew to bibimbap. β Key features β’ Photo analysis β snap a meal and the app separates the dishes and estimates four nutrients. β’ Today's budget β compare against sodium, potassium, phosphorus, and protein limits matched to your CKD stage and body weight, in real time. β’ Chat with your buddy β ask about foods and nutrients; answers are grounded in the app's food database. β’ Medical report PDF β summarize recent meals and lab values to share with your doctor. β’ Smart reminders β meal, medication, and check-up reminders, with an instant heads-up when sodium nears your limit. β’ Nutrition-label scan β photograph a packaged-food label to auto-fill its nutrients. β’ Blood-test log β estimate your CKD stage from eGFR and keep your kidney numbers in one place. β’ 30 & 90-day trends β see how your nutrients flow over time. β’ Your journey, My Foods, Salt meter β stay motivated to log, save frequent foods, and precisely enter salt in soups. β For people with CKD No scary scores. Instead of "dangerous," we explain "why," and when you go over a limit we tell you without blame. β Privacy Your records stay on your device. Food photos are used only briefly for nutrition analysis and are not stored. This app is an informational and self-management tool providing AI estimates β not medical advice, diagnosis, or treatment. Always discuss diet and treatment decisions with your healthcare provider.
Screenshots
Verdict
The clearest difference is in-app purchases: Magic Kidney at none against KidneyWatch's 2. KidneyWatch's advantage is update cadence (every 5 days vs every 3 weeks). On price, ads, device support and iOS requirement 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. KidneyWatch sells 2 in-app purchases, starting at $9.99 per month. Magic Kidney asks for nothing beyond the download.
KidneyWatch ships an update every 5 days, Magic Kidney every 3 weeks. Both last shipped on October 31, 2026.
| Parameter | KidneyWatch | Magic Kidney |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 days β better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | No β better |
| Devices | iPhone, iPad β better | iPhone |
| Requires iOS | 16.0 β better | 16.4 |
| Further details β not scored | ||
| Size | 35 MB | 72 MB |
| Age rating | 12+ | 12+ |
| Developer | Jae Kim | jaejeong bang |
In-app purchases
KidneyWatch
- KidneyWatch Monthly7 Days trial$9.991 Month
- KidneyWatch Annual7 Days trial$59.991 Year
Magic Kidney
No in-app purchases









