KidneyDiet vs Sistens
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KidneyDiet
This app assists individuals with kidney disease in monitoring key nutrients like phosphorus, potassium, and protein. It offers personalized daily guidelines, a comprehensive food database, and detailed nutrient tracking to support informed dietary choices. Users can also log favorite foods and share their progress with healthcare providers.
- Track phosphorus, potassium, and protein
- Personalized daily guidelines
- Extensive food and nutrient database
- Detailed nutrient intake charts
- Log favorite foods
- Email daily diary
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KidneyDiet® helps you watch the 3Ps. Phosphorus. Potassium. Protein. KidneyDiet helps people with kidney disease make better choices. Watching your nutrient intake and educating yourself about your nutrition needs changes during the course of kidney disease. Whether you are on dialysis or not, you must become aware of the following in your diet: PHOSPHORUS POTASSIUM PROTEIN SODIUM FLUIDS KidneyDiet makes it easy to personalize your Daily Diary Guidelines and compare your nutritional intake against your doctor's recommendations. - KidneyDiet provides an extensive, comprehensive research-quality food and nutrient database. - Charts and tables provide clarity on your nutrition. - Nutrient tracking is comprehensive and shows insight into your intake of carbohydrates, glycemic index, glycemic load, fat, cholesterol, vitamins and minerals in the foods you eat. - Personalized guidelines tailor the app to meet your specific needs. - Keep a list of favorite foods. - Email your Daily Diary to yourself or your healthcare provider. ** Free 2-week trial! ** During the trial period all features are available. After the trial period, you will still have access to the "learning" section of the app which provides educational information about nutrients and you will still be able to search for foods, accessing an extensive database. Upon subscribing, you will once again have access to all features, unlocking your diary, favorites, charts, and customizing your nutrient guidelines. You will not be inconvenienced by advertising interrupting your app usage, ever. Eat right. Enjoy life.
Sistens
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Sistens enables users to submit two pictures which we then use to create your BioStructural Analysis report. The purpose of the analysis is to look for structural deviations of the body so we can recommend corrective techniques & exercises. BioStructural deviations have been shown to lead to degenerative disc disease (DDD) and/or osteoarthritis (OA) of the spine. Correcting these deviations helps prevent DDD & OA from occurring and improves overall health, performance, spinal hygiene, and well-being.
Screenshots
Verdict
The clearest difference is in-app purchases: Sistens at none against KidneyDiet's 2. KidneyDiet's advantage is ads (none vs shown) and update cadence (every 3 months vs every 28 months). 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. KidneyDiet sells 2 in-app purchases, starting at $7.99 per month. Sistens asks for nothing beyond the download.
KidneyDiet ships an update every 3 months, Sistens every 28 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | KidneyDiet | Sistens |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (321 ratings) — better | — |
| Positive reviews | 63.4% of reviews | — |
| Number of ratings | 321 — better | — |
| Update frequency | Every 3 months — better | Every 28 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.1 — better | 15.6 |
| Further details — not scored | ||
| Size | 297 MB | 43 MB |
| Age rating | 12+ | 12+ |
| Developer | Kismetly, Inc. | KenneTech LLC |
Bugs and requests
KidneyDiet
Reported bugs
14 issues- App crashes when clicking 'see all nutrition' or 'add to diary' buttons
- Barcode scanner not functioning (QR code error)
- Many foods display without portion size options
- Cannot add custom portion sizes for preset foods
- Login and password reset emails not sending
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- In-app purchases blocked with error notifications
- App becomes unstable after recent updates
- Inaccurate nutritional information compared to package labels
- Favorites automatically populated without user confirmation
- Cannot delete items from diary once added
- Food search returns irrelevant results (e.g., oatmeal cookies instead of oatmeal)
- Red warning indicators disappearing after app updates
- Subscription data lost after app reinstall
- Incompatibility with new iPhone models
Requested features
21 requests- Add carbohydrates and cholesterol tracking for diabetic patients
- Allow users to edit saved custom foods
- Ability to delete items from favorites without limitation
- Multi-year subscription discounts
- Recipe builder with automatic nutrient calculation
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- Meal-based logging instead of individual items
- Landscape orientation support for iPad
- Add sugar and calories to daily totals chart
- Flexible portion size entry (e.g., 4 ounces instead of 1 ounce)
- List view of daily foods with all nutrients visible
- Ability to mark nutrients as 'unknown' with daily flags
- Track blood pressure, pulse, weight, and temperature
- Weekly and multi-day intake review
- Recent/commonly-used foods quick access
- Better search functionality (e.g., 'apple' returns 'applesauce')
- Expanded restaurant menu options
- International food databases (UK, Australia, Hispanic foods)
- Dry weight tracking for dialysis patients
- Nutrient comparison tool to suggest healthier alternatives
- Custom measurement unit preferences
- Ability to add ingredients for automatic nutrient calculation
Sistens
Not enough reviews yet to summarise bugs or requests.
In-app purchases
KidneyDiet
- Monthly Subscription$7.991 Month
- Yearly Subscription$54.991 Year
Sistens
No in-app purchases
