Grewyn: Gym Log & AI Coach
iOS app by ONUR ERGUN. Health & Fitness · ONUR ERGUN
- Store rating
- 0 / 5
- Store rating count
- 0
- Download price
- Free to download
- In-app purchases
- Unknown
- Version
- 1.1
- Listing last refreshed
- 2026-09-13
View the original store listing
Store description excerpt
Most gym apps hand you an empty grid and expect you to know what to lift. Grewyn tells you — and tells you why. Answer a few questions and Grewyn builds you a real training program, drawn from a library of 62 evidence-based programs rather than invented on the spot. It fills every slot with a real exercise you can actually do with the equipment you have. Then it works out the exact weight to start with, from your bodyweight, experience and the movement itself — and corrects it from what you actually lift, within a session or two. Every recommendation comes with a reason in plain English. No black box. WHAT YOU GET • A real program, not a template Matched to your goal, your schedule, your equipment and your injuries. Read the science behind it, the evidence it draws on, and what to expect. • The exact weight for every set Computed for your body, then calibrated to your real logged effort. Never a hardcoded number, never a guess. • A coach that explains itself Finish a session and get a debrief: what you moved, how it compares to last time, what to do next — and the reasoning behind it. • Progress you can actually see Estimated 1RM per lift, weekly volume, muscle balance, rep-range mix, consistency, bodyweight and relative strength. Drill from a chart all the way down to a single logged set. • Bodyweight training that finally counts A pull-up moves most of you. Other apps log it as 0 kg. Grewyn credits it properly, so your calisthenics show up in your tonnage, your records and your progress. • 873 exercises, with photos Search and filter by muscle, equipment, level, force, mechanic and type. Add your own with your own photos. • Streaks, and 74 medals worth chasing Schedule-aware streaks that understand rest days. A collection that rewards showing up, not overtraining. • Rest timer, plate math, kg or lb The small things, done properly. PRIVATE BY DESIGN Grewyn has no servers, makes no network requests, and has no account to create. The planner and the coach run entirely on your device using Apple Intelligence. Your training data never leaves your phone, because there is nowhere for it to go. It works in airplane mode. It works in a basement gym with no signal. TRY IT FREE Your first day is completely free — the whole app, nothing held back. Train, log every set, finish, and read your debrief. After that, Grewyn Premium unlocks unlimited training. GREWYN PREMIUM • Monthly — $4.99 per month • Yearly — $29.99 per year, with a 3-day free trial (save 50%) Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours of the end of the current period. If you start the free trial and do not cancel at least 24 hours before it ends, it becomes a paid yearly subscription. Manage or cancel your subscription in your Apple Account settings, or from inside the a
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