# KidneyDiet vs Sistens

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.

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 November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | KidneyDiet | Sistens |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (321 ratings)](https://appshunter.io/ios/app/kidneydiet/id373471282/reviews)** | — |
| Number of ratings | **321** | — |
| Positive reviews | 63.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 3 months** | Every 28 months |
| Monetization | Freemium | — |
| Size | 297 MB | 43 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Kismetly, Inc.](https://appshunter.io/developer/373471285) | [KenneTech LLC](https://appshunter.io/developer/1220083928) |

## What reviewers say

### KidneyDiet

[App page](https://appshunter.io/ios/app/kidneydiet/id373471282)

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.

**Highlights:** Track phosphorus, potassium, and protein, Personalized daily guidelines, Extensive food and nutrient database, Detailed nutrient intake charts, Log favorite foods, Email daily diary

**Features:** Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $7.99 | per month |
| Yearly Subscription | $54.99 | per year |

**What reviewers like**

- ✅ Tracks essential kidney nutrients (phosphorus, potassium, protein)
- 📊 Visual daily totals and progress tracking
- 🔍 Barcode scanner for quick food lookup
- ⭐ Favorites list for frequently eaten foods
- 📧 Email diary feature for sharing with healthcare providers

**What reviewers complain about**

- 🐛 App crashes when viewing nutrition details or adding items
- 🔧 Inconsistent measurement units (grams, ounces, cups)
- 📉 Limited food database compared to competitors
- ❌ Cannot delete items from favorites list
- 🔐 Account creation required before trial

**Reported bugs**

- 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

**Requested features**

- 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


### Sistens

[App page](https://appshunter.io/ios/app/sistens/id1624999614)

**In-app purchases:** none


## Frequently asked questions

### Is KidneyDiet free?

KidneyDiet is free to download, with in-app purchases available.

### Is Sistens free?

Sistens is free to download, with no in-app purchases.

### Do KidneyDiet or Sistens have ads?

Sistens shows ads; KidneyDiet does not.

### Which is updated more often, KidneyDiet or Sistens?

KidneyDiet ships an update every 3 months, and Sistens every 28 months. Most recently, KidneyDiet was updated on November 1, 2026 and Sistens on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*