Tracking fluid and weight gain on haemodialysis

Between haemodialysis sessions, many people are asked by their unit to keep an eye on how much they drink and on the weight they put on before their next treatment — often called interdialytic weight gain. Kidney Tracker gives you a simple, private place to keep both of those records on your iPhone. It logs your fluid and adds it up for you, and it charts your weight so the gain between sessions is easy to see. It does not set any limits and it never offers clinical advice — it just keeps the numbers your team has asked you to track, neatly in one place.

Interdialytic weight gain on a chart

Record your weight whenever it suits — for example after a session and again before the next one — and the app plots it over days and weeks. Seeing the rise and fall as a line, rather than a column of figures, makes the gain between sessions easy to notice and easy to talk through at your unit. You decide when and how often to weigh; the app simply keeps the record and draws the chart.

Staying within a fluid limit you set

On non-dialysis days especially, keeping within a daily fluid limit can be a real focus. In Kidney Tracker you set your own daily fluid target — a number you choose from guidance your kidney team has given you — and the Today screen keeps a live running total of your intake and shows how much of your allowance is left. Save the amounts you drink most so a usual cup or glass is a single tap, and let a configurable day-start hour line your totals up with a clinic's 24-hour chart rather than resetting at midnight.

Everything else in one place

Alongside fluid and weight you can note blood pressure, keep a list of your medications with local reminders on your device, and record any blood results your unit reads back to you so you can follow them over time. A Home-Screen widget shows today's running total without opening the app, an Apple Watch complication keeps it on your wrist, and Siri lets you add a drink by voice when your hands are full.

Private, and yours to share

There is no account, no sign-up and no tracking — everything you enter stays on your own iPhone. When a clinic visit comes up, turn your records into a clean, printable report and print or share it; it goes only where you send it and the app keeps no copy. If you are weighing up the two main treatments, our broader dialysis overview and the peritoneal dialysis page cover those too.

Kidney Tracker is a personal record-keeping tool. It is not a medical device and does not provide medical advice — always follow your own clinical team.