# LiftDiff — Gym Note, Workout Tracker

> Gym Note, Workout Tracker (iPhone/iPad app by Yoshiaki Nozaki.)

- Source: https://appshunter.io/ios/app/liftdiff/id6806490699 (this page in markdown: same URL + `.md`)
- Developer: [Yoshiaki Nozaki](https://appshunter.io/developer/6806490701)
- Category: Health & Fitness
- Price: Free
- Age rating: 4+
- Requires: iOS 26.5 · 8 MB
- Languages: American English
- Released: 2026-09-03
- Data updated: 2026-09-28
- User reviews in markdown: https://appshunter.io/ios/app/liftdiff/id6806490699/reviews.md

## What is LiftDiff?

Simplified gym log.

■ Press. Slide. Logged.
Hold the start button and your routines fan out under your thumb. Slide onto the one you came here to do — one thumb, one motion, from anywhere in the app. Favorites sit closest to your thumb, and you can start empty and add exercises as you go.

■ Lift more. Tap less.
The set ends, the timer starts, and you put the phone down. Rest runs in the Dynamic Island and on the Lock Screen — never unlock to check it, and never open the app to start the next set. Complete a set from the Lock Screen, or expand for the next exercise, sets left, and time remaining.

■ See where the load landed.
Every set you log feeds a per-muscle recovery estimate, drawn on a body map. Not a single "readiness" number — seventeen muscles, each decaying at its own rate.

Which muscle is most fatigued is reasonably reliable. How fatigued it is — the absolute number, the percentage — is a rough guide only. Sleep, nutrition, stress and age are not part of this calculation.

■ Week by week, exercise by exercise.
See your progress, not just your logs. Every week is diffed against the one before it, and what moved is marked ++ or −. Every exercise keeps its own estimated 1RM, top weight and volume over time, with every set you have ever done under the chart.

■ Friends.
Share only a summary of the workout you finished. Friends see that you trained, how long, how many sets, and which muscles — exercise names and weights only if you choose to include them. Your actual records, the sets and the notes, never leave your device. Per-exercise rankings — estimated 1RM, top weight, and sets this week — let you line up against friends who train the same lift.

■ Import anything. Export everything.
Bring your history in from anything — another app's export, a spreadsheet, your own notes. Strong and Hevy CSVs import directly. For anything else, the app hands you a prompt that converts it, and RPE becomes RIR on the way in.

Take it back out as JSON or CSV, as a file or straight to the clipboard in one tap. RIR, notes and warm-up sets all survive the round trip.

It is one SQLite file on your device, with no third-party analytics SDKs. The schemas are public, so anything can read it. Including you.
liftdiff.history/v1 · liftdiff.routine/v1

■ The essentials.
・175 exercises
・RIR & RPE
・Supersets
・Warm-up & drop sets
・Plate calculator
・Rest timer
・Home Screen widgets
・Shareable images
・Per-muscle set counts
・Custom exercises
・Short-version routines
・Favorites
・iCloud sync
・English & 日本語


## Version history (last 5 releases)

### 1.3 — 2026-09-17

Rebuilt around one thumb.

■ New tabs and start button
・Four tabs, with the start button on its own in the bottom right. Press and slide it to pick from the routines you use most
・During a workout that same button becomes the rest timer. The ring counts down, and tapping it takes you back to the session
・Pull the session screen down and it settles into a bar. Your set count stays visible, and tapping it brings the screen back
・Swipe the bar sideways to finish or discard without opening it

■ Recovery for each routine
・The start screen now shows how recovered each routine's main muscles are, as a percentage
・Green when you're ready, orange or red when fatigue is still there — so picking today's session is a number, not a guess

■ Get advice from AI (new)
・Packages your last 12 weeks into something you can paste straight into ChatGPT or Claude, and get advice that reads your own numbers
・Pick what you want to ask about: the overall picture, stalled exercises, muscle balance, or fatigue and rest
・Sits next to "Build a routine with AI", both one tap from your profile

■ While logging
・Each set now shows its estimated 1RM, updating as you type weight and reps

■ Diff vs last week
・Rebuilt. It opens with a single line comparing you to the same point last week, so it reads correctly mid-week
・Exercises that went up or that you just started are listed with their numbers, alongside an 8-week line of weekly volume
・The detailed figures are folded away

■ iCloud sync
・Now syncs when you open the app and when you come back to it, instead of only from the settings screen
・If the iCloud account on the device changes, we ask whether to move this device's data over. Nobody's log gets mixed into someone else's account
・Reinstalling no longer leaves you with two copies of the sample routines

■ Fixes
・Fixed a crash that could happen when the rest timer finished
・Fixed a crash when importing a CSV with non-numeric values like "AMRAP" in a reps column
・JSON copied from a chatbot no longer fails to import because of curly quotes
・Fixed the session screen getting heavy during rest

### 1.2 — 2026-09-10

Friends, finished — plus new Home Screen widgets and tools for talking to your AI.

■ Home Screen widgets
・New "Friend code" widget: your QR and your friends' latest workouts, right on the Home Screen. The large size adds a heatmap of your recent training next to the QR
・Also new: a feed-only widget that lists your friends' workouts (medium & large)
・The feed and widgets stay up to date even while the app is closed

■ Friends
・Set an avatar (a single emoji). It shows in the feed, the friends list and the rankings
・Tap a name or avatar to open their page — all-time totals, consistency, and their recent workouts in the same cards as the feed
・Tap a reaction to see who reacted
・Reactions now appear the moment you tap

■ Ask your AI
・New in export: "Summary for AI". Your entire history folds into a text one-tenth the size of the JSON — paste it into the AI of your choice and ask how your training is going. Two ranges: last 12 weeks, or all time
・There is also a prompt that asks an AI to build you a routine. Whatever comes back imports directly
・Neither one makes a network call. The app only hands you the prompt

■ Share image
・Rebuilt the card face: your avatar, name and date, a clear / frosted / solid background, and a switch for showing weights

■ Everything else
・Fixed several small bugs

### 1.1.3 — 2026-09-07

Friends fixes
- Fixed friend requests not reaching the other person, and accepted requests not showing up on their side
- Larger QR code on the Friends screen
- Added "Delete iCloud data" in Settings

### 1.1.2 — 2026-09-06

Fixed an issue where friend requests were not being received.

### 1.1.1 — 2026-09-05

The friend feature is made easier to find. You can enable it directly from your My Page.

Friends.

■ Friends (new)
・Share only a summary of the workout you finished. Friends see that you trained, how long, how many sets, and which muscles — exercise names and weights only if you choose to include them. Your actual records (sets, notes) never leave your device
・Connect with a friend code or a QR code. Both sides have to accept
・Your own last 30 days and your friends' workouts sit in one feed
・Reactions 
・Per-exercise rankings — estimated 1RM, top weight, and sets this week — among friends who train the same lift
・Notifications when a friend finishes a workout, and when someone reacts to yours (each can be turned off)

■ Import and export
・Imports are now kept as batches, so a whole import can be undone at once
・Exercises that did not match a name can be re-linked afterwards
・Added an option to erase your entire history
・Bodyweight is no longer counted in the volume of bodyweight exercises

■ During a workout
・The rest timer sound no longer gets buried under music
・When rest ends, the session screen comes back on its own
・Bigger rest display on the Lock Screen and in the Dynamic Island
・Rep ranges from your routine now show on the training screen
・Rebuilt the start button's radial menu — hold and slide, or tap once to keep it open

■ After a workout
・The finish screen is now a single card you can share as it is
・Added a "card" face to the share image

■ Everything else
・Sets and volume added to the weekly view
・Better exercise name matching, and unused custom exercises can be removed in bulk
・If the app quits mid-workout, you can pick up where you left off
・Fixed several crashes

## Apps similar to LiftDiff

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Lift AI - Gym Workout Planner](https://appshunter.io/ios/app/lift-ai-gym-workout-planner/id6774068336) | 3.0 (2) | Free | Health & Fitness |
| [Eat - Calorie Counter & Diet](https://appshunter.io/ios/app/eat-calorie-counter-and-diet/id6473125509) | 5.0 (2) | Free | Health & Fitness |
| [Metrya - AI Health Advisor](https://appshunter.io/ios/app/metrya-ai-health-advisor/id6760779874) | 4.3 (6) | Free | Health & Fitness |
| [Gains: Gym Workout Log & Plans](https://appshunter.io/ios/app/gains-gym-workout-log-and-plans/id1446517384) | 4.8 (45) | Free | Health & Fitness |
| [MMH Calculator](https://appshunter.io/ios/app/mmh-calculator/id448611745) | 5.0 (1) | Free | Health & Fitness |
| [Helthy - Calorie Tracker](https://appshunter.io/ios/app/helthy-calorie-tracker/id6751759974) | 4.8 (22) | Free | Health & Fitness |

---

*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 2026-09-28.*