# Kidneybook: CKD Lab Tracker — eGFR and creatinine, charted

> eGFR and creatinine, charted (iPhone/iPad app by RAINBOW TREE LLC.)

- Source: https://appshunter.io/ios/app/kidneybook-ckd-lab-tracker/id6794885236 (this page in markdown: same URL + `.md`)
- Developer: [RAINBOW TREE LLC](https://appshunter.io/developer/1619997282)
- Category: Medical, Health & Fitness
- Price: Free
- Age rating: 12+
- Requires: iOS 17.0 · 12 MB
- Languages: American English, Japanese
- Released: 2026-07-31
- Data updated: 2026-09-04
- User reviews in markdown: https://appshunter.io/ios/app/kidneybook-ckd-lab-tracker/id6794885236/reviews.md

## What is Kidneybook?

Your lab reports, as one line.

Kidneybook is a simple log for chronic kidney disease. Type in the creatinine and eGFR values you get at each appointment and years of history become clear at a glance. No sign-up. No ads. Everything stays on your device.

■ 16 lab items, all free
Creatinine, eGFR, urea nitrogen, uric acid, urine protein, urine albumin, potassium, phosphorus, sodium, calcium, albumin, hemoglobin, LDL cholesterol and more. Add your own items when your clinic measures something that isn't here, and reorder or hide the ones you don't use.

■ Work back through the folder
Start with your most recent report, then use Save and go to the previous test — the date steps back by your appointment interval. You can enter years of old reports in order, up to 20 years back.

■ The difference from last time, and nothing more
Each value shows the change from the previous test with a + or −. There is no colour-coding, no reference ranges, no "abnormal" flag, and no eGFR calculation. It is your record, not a judgement.

■ Daily weight and blood pressure, if you want them
Turn on the Daily tab to record weight and blood pressure at home, morning and evening. Leave it off if you only want lab values.

■ One page for the clinic
The last 12 tests as a single landscape table (Pro).

Free: all 16 lab items, adding and reordering items, entering past tests, and the last 90 days of the charts.
Pro (a one-time purchase, no subscription): charts over all time, the clinic PDF, CSV export, and managing other people.

Note: this app is a log for your lab results. It does not diagnose, treat, or provide medical advice; it makes no comparison against reference ranges and does not calculate eGFR. Always talk to your doctor about your values, how you feel, and your treatment.


## Version history (last 4 releases)

### 1.1.1 — 2026-09-01

Thank you for using the app.

This update revisits the details so everything feels a little smoother, including parts you may never notice.

If anything catches your eye, please let us know from the contact form inside the app. Your notes are what shape the next update.

### 1.1.0 — 2026-08-16

Kidneybook is now available in English.

Also in this update:
- Clearer notification settings

### 1.0.1 — 2026-08-05

・アプリの安定性を改善しました。
・不具合が起きたときの記録を自動で受け取れるようにし、次の更新で早く直せるようにしました。

### 1.0 — 2026-07-31

No release notes.

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All apps by RAINBOW TREE LLC: https://appshunter.io/developer/1619997282

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-04.*