# KidneyDiet vs PhosFilter

The clearest difference is ads: KidneyDiet at none against PhosFilter's shown. KidneyDiet also leads on review sentiment (63% vs 36%). PhosFilter's advantage is update cadence (every 6 weeks vs every 3 months) and iOS requirement (13.4 vs 15.1). On price, rating, ratings volume and in-app purchases there is nothing between them.

Both are free to download. KidneyDiet sells 2 in-app purchases, starting at $7.99 per month and PhosFilter sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.4 for KidneyDiet against 4.4 for PhosFilter. Both are backed by a comparable volume of ratings — 311 and 172 respectively. Written reviews are what separate them: 63% of KidneyDiet's written reviews are positive against 36% of PhosFilter's.

KidneyDiet ships an update every 3 months, PhosFilter every 6 weeks. The most recent releases landed on September 23, 2026 and July 18, 2026 respectively.

## The numbers

| Metric | KidneyDiet | PhosFilter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (311 ratings)](https://appshunter.io/ios/app/kidneydiet/id373471282/reviews) | **[4.4 (172 ratings)](https://appshunter.io/ios/app/phosfilter/id1532994680/reviews)** |
| Number of ratings | **311** | 172 |
| Positive reviews | **63.4% of reviews** | 36.4% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 297 MB | 67 MB |
| Requires iOS | 15.1 | **13.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Kismetly, Inc.](https://appshunter.io/developer/373471285) | [Logic Lab 406 LLC](https://appshunter.io/developer/1777938716) |

## 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


### PhosFilter

[App page](https://appshunter.io/ios/app/phosfilter/id1532994680)

This app helps users identify added phosphates in ingredient lists. It is particularly useful for individuals managing Chronic Kidney Disease (CKD) or on dialysis (ESRD).

**Highlights:** Identify added phosphates, Scan ingredient lists, Dietary management aid, CKD support, ESRD support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad Free Monthly Subscription | $0.99 | per month |


## Frequently asked questions

### Is KidneyDiet free?

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

### Is PhosFilter free?

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

### Which has better reviews, KidneyDiet or PhosFilter?

PhosFilter is rated higher. KidneyDiet averages 4.4 out of 5 from 311 ratings, while PhosFilter averages 4.4 from 172 ratings.

### Do KidneyDiet or PhosFilter have ads?

PhosFilter shows ads; KidneyDiet does not.

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

KidneyDiet ships an update every 3 months, and PhosFilter every 6 weeks. Most recently, KidneyDiet was updated on September 23, 2026 and PhosFilter on July 18, 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.*