Small, focused iPhone apps for recovery, sleep, fasting and nutrition — built on Apple Health, with your data staying on your device.
Recovery & Strain
Know whether today is a day to push or a day to back off. Rythm reads your Apple Health data — HRV, resting heart rate, sleep and workouts — and turns it into a daily recovery score, a strain score, and a plain-English insight about what changed and why.

Subscription required
Calorie, Macro & Fasting Tracker
Your fast tracks itself. Log a meal and MacroFast works out your fasting window from it automatically — no timer to remember to start or stop. Scan a barcode or search an offline food database for calories and macros, and if you wear a CGM, see how what you ate and how long you fasted line up with your glucose.

Free download · Premium subscription available
Intermittent Fasting Tracker
See what fasting actually does to your body. Start your fast and watch the ring fill — then open Insights to see your heart rate, HRV, blood glucose and weight graphed across the fast, pulled straight from Apple Health. Most fasting apps stop at the timer.

Free download · Premium subscription available
Sleep timer for Apple Music
Fall asleep to your own Apple Music library. Set a timer, and MySleepMusic fades the volume down gently and stops playback — so the music doesn't play all night or cut off abruptly.
Subscription required
VO₂ Max Estimator
One VO₂ max number is a guess. VO2Stats estimates yours several ways at once — from your resting and max heart rate, running pace, a walk test, heart-rate recovery, and more — all from your Apple Health history, so you see the range instead of trusting a single figure. Apple's own estimate is shown alongside for comparison.
Free · no ads, no in-app purchases
Track Weights & Muscle
A focused strength tracker built around rotating routines. Log your sets, reps, weight and RPE with a built-in rest timer, and Gym tracks your estimated 1-rep-max trend and per-muscle volume over time — showing which muscles you've worked on an interactive body model. Import your history from other apps, and optionally connect Apple Health (read-only) for heart-rate zones and calories. Fully on-device, no account.
Subscription required
Walking & Running Stats
Every walk, run, and hike you've ever logged in Apple Health, all in one place. StrideStats pulls your full activity history — years back — and breaks it down by activity type with charts for distance, pace, elevation, heart rate, and more. A dedicated Steps tab shows daily step counts from your iPhone and Apple Watch.
One-time purchase · no subscription, no ads, no in-app purchases
Cycling Stats & History
Every ride you've ever logged in Apple Health, all in one place. BikeStats pulls your full cycling history — years back — and breaks it down into outdoor vs. indoor, with charts for distance, speed, elevation, power, cadence, and more. Indoor rides without GPS get estimated distances based on your own outdoor averages.
One-time purchase · no subscription, no ads, no in-app purchases
Hear Soft Voices Louder
Turn your iPhone into a simple personal sound amplifier. Voice Amplify listens through the microphone and plays it back louder through the speaker in real time — perfect for hearing a soft-spoken family member or a quiet conversation more clearly. Big, simple controls designed to be easy for everyone. It is not a hearing aid or medical device.
Free · no subscription, no ads, no in-app purchases
Add What Your Watch Missed
Did your treadmill run or indoor cycling session record without distance? Workout Editor lets you fill it in after the fact. Enter the distance you covered and the app creates an enhanced copy of the workout in Apple Health — complete with speed, pace, and the original calorie data — without touching the original.
One-time purchase · no subscription, no ads, no in-app purchases
Organize a Loved One's Pillbox
Built for family caregivers managing a weekly pill organizer for an aging or unwell parent. PillBox mirrors the physical Sun–Sat, Morning/Noon/Night pillbox layout, tracks pill inventory so you know before it runs out, and keeps every medication's doctor, dose, color, shape, and photo in one place — so filling the box each week is fast and accurate, even across multiple prescriptions from different doctors.
Free · no subscription, no ads, no in-app purchases