GapFluid: Fluid Limit Tracker

GapFluid helps you stay under a fluid limit your doctor or dialysis team has set. Log what you drink in one tap, watch your daily budget count down, and keep weight and blood pressure next to it — so your next appointment starts with real numbers instead of guesses. Built for people on hemodialysis or peritoneal dialysis, with chronic kidney disease, heart failure, or hyponatremia — anyone living with a daily fluid restriction. FIX A MISTAKE? EDIT IT. Every entry — fluid, weight, blood pressure — can be edited, deleted or back-dated. Forgot to log last night's tea? Add it to yesterday. That's the whole point. WHAT'S FREE • One-tap fluid logging with quick-add containers you can edit (cup, glass, bottle, your own) • Daily budget ring that shows what's left, in oz or mL • Dialysis with residual urine output: your allowance adds yesterday's output automatically • Weight log with a trend chart and optional gain flags (overnight, 3-day, 7-day), in lb or kg • Blood pressure and pulse log with a trend chart • 7 days of history, all editable • Free backup and restore: save all your data to one file, wherever you choose, and bring it back on this phone or a new one • Dark and light themes, and text up to 200% GAPFLUID PRO — ONE-TIME $3.99 • Unlimited history, browse any date range • PDF export laid out for an appointment, plus CSV for spreadsheets • Multiple profiles, for caregivers tracking more than one person • A simple medication list (name, dose, time of day — not reminders) • A "questions for my doctor" notepad that goes into your PDF Pay once ($3.99 in the US; Google Play shows the price in your currency) and keep it, including future updates. No subscription, ever. PRIVATE BY DESIGN • No internet permission: GapFluid itself can't go online, so it can't send your data anywhere. (Buying Pro is handled by the Google Play app.) • Works completely offline (only buying Pro goes through Google Play) • No account, no sign-in, no email • No ads • Your data is stored on your phone. GapFluid has no servers of its own, so nothing you log is sent to us. • GapFluid doesn't copy your data to the cloud. Your backup is a file you save and control. • Purchases go through Google Play; we never see your payment details. IMPORTANT GapFluid is not a medical device and does not diagnose, treat, cure, or prevent any medical condition. It's a logging tool: your fluid target is set by your care team, and GapFluid tracks against it — it does not prescribe fluid limits. Weight-trend flags are informational only and may be worth mentioning at your next appointment. Always follow your healthcare professional's advice, and don't use this app for emergencies. Made by GapLogic, a two-person studio. Let's fix the gap in the app.

First release of GapFluid: log fluids against your care team's daily limit, track weight and blood pressure with trend charts, and back up your data to a file you control. No internet permission, no ads, no account.