# PhosFilter vs Kidney Transplant Compare

The clearest difference is review sentiment: Kidney Transplant Compare at 100% against PhosFilter's 36%. Kidney Transplant Compare also leads on rating (5.0 vs 4.4) and in-app purchases (none vs 2). PhosFilter's advantage is ratings volume (197 vs 4) and iOS requirement (13.4 vs 18.6). On price, update cadence and device support there is nothing between them.

Both are free to download. PhosFilter sells 2 in-app purchases, starting at $0.99 per month. Kidney Transplant Compare asks for nothing beyond the download.

Kidney Transplant Compare holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: PhosFilter has 197 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 36% of PhosFilter's written reviews are positive against 100% of Kidney Transplant Compare's.

PhosFilter ships an update every 6 weeks, Kidney Transplant Compare every 3 months. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | PhosFilter | Kidney Transplant Compare |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (197 ratings)](https://appshunter.io/ios/app/phosfilter/id1532994680/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/kidney-transplant-compare/id6446149569/reviews)** |
| Number of ratings | **197** | 4 |
| Positive reviews | 36.4% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 70 MB | 26 MB |
| Requires iOS | **13.4** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Logic Lab 406 LLC](https://appshunter.io/developer/1777938716) | [Island Peer Review Organization, Inc](https://appshunter.io/developer/986004719) |

## What reviewers say

### 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

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad Free Monthly Subscription | $0.99 | per month |
| Pro | $4.99 | one-time |


### Kidney Transplant Compare

[App page](https://appshunter.io/ios/app/kidney-transplant-compare/id6446149569)

This app educates adults with kidney disease about kidney transplantation and helps them compare transplant centers. It provides information on transplant options, center selection criteria, support services, and outcome data to aid informed decision-making.

**Highlights:** Kidney transplant education, Transplant center comparison, Patient selection criteria, Support services information, Transplant outcome data, Average wait time, Transplant volume

**In-app purchases:** none


## Frequently asked questions

### Is PhosFilter free?

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

### Is Kidney Transplant Compare free?

Kidney Transplant Compare is free to download, with no in-app purchases.

### Which has better reviews, PhosFilter or Kidney Transplant Compare?

Kidney Transplant Compare is rated higher. PhosFilter averages 4.4 out of 5 from 197 ratings, while Kidney Transplant Compare averages 5.0 from 4 ratings.

### Do PhosFilter or Kidney Transplant Compare have ads?

PhosFilter shows ads; Kidney Transplant Compare does not.

### Which is updated more often, PhosFilter or Kidney Transplant Compare?

PhosFilter ships an update every 6 weeks, and Kidney Transplant Compare every 3 months. Most recently, PhosFilter was updated on October 24, 2026 and Kidney Transplant Compare on October 6, 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.*