Cycling through all six. Tap any point to stop.

Measured on six things

Workout tracker with muscle heatmaps and volume landmarks

Usability

One-tap logging, auto rest timer, last-session prefill and offline save keep the gym loop short. Hevy CSV import and CSV/JSON export lower switching cost. Only 1 store rating, so real onboarding is unverified.

Screenshots

1 / 10

Gryper

About this app

Gryper is a free iPhone workout tracker designed for serious lifters who want to know if they're training enough. It lets you log every set in one tap, then maps each set onto a detailed muscle heatmap. The app grades your weekly volume per muscle against MEV, MAV, and MRV—research-based volume landmarks that tell you if you're under-training, in the sweet spot, or overdoing it. With offline support, 170+ exercises, automatic rest timers, and seamless import from Hevy, Gryper offers a fast, focused logging experience. It also tracks estimated one-rep maxes and session grades, so you know exactly how you're progressing. Currently available on iOS, with an Android closed beta in progress.

Key features

1One-tap set logging with last-session prefill and auto-starting rest timer
2Muscle heatmap grading weekly volume per muscle against MEV/MAV/MRV landmarks
3Offline-first logging with sync on reconnect; 170+ exercises mapped to muscles
4Estimated 1RM tracking, session grades vs last eight sessions, and PR callouts
5Hevy CSV import plus CSV/JSON export for full data portability

Target customer profile

Drawn from the product itself, not from a survey.

Demographic

Intermediate to advanced lifters

Pain points

Unsure if weekly volume is enough for each muscle group

Primary needs

Track volume per muscle, hit MEV/MAV/MRV targets

Demographic

Strength athletes (powerlifters, bodybuilders)

Pain points

Need precise data on muscle-specific training and recovery

Primary needs

Monitor volume landmarks, track e1RM, optimize programming

Demographic

Busy professionals who lift

Pain points

Limited time; need quick logging without sacrificing insight

Primary needs

One-tap set logging, offline mode, auto rest timer

Scout Review

Written by AI from measured evidence, scored out of 100.

Gryper is a focused iPhone workout tracker that grades weekly volume per muscle against MEV/MAV/MRV — the thing Hevy and Strong deliberately don't do. The app UI is polished and consistent, the logging loop is genuinely short, and the measured performance is excellent. The website undersells it badly, the muscle map leans on color alone, and with one App Store rating there's no independent proof the experience matches the pitch. For lifters who already keep a volume spreadsheet, this is a credible replacement. For everyone else, it's a niche tool that knows exactly who it's for.

Measure by measure

Usability

Design

Judging the app UI: dark navy with green deltas, a front/back muscle heatmap and clean session cards read as polished and consistent. The marketing site is the weak half — blurry purple gradient, weightless nav.

Speed

Lighthouse mobile 97/100 (LCP 2.5s, CLS 0, TBT 15ms), desktop 98/100. Offline-first logging means sets save locally and sync later, so the gym loop never waits on a spinner.

Security

HTTPS enforced with HSTS, CSP, frame protection, Referrer-Policy and Permissions-Policy — 11/12 probe points. SPF is missing and no SOC 2, ISO or pen-test claims exist, which is normal at this stage.

Accessibility

Lighthouse a11y 97/100; the one failing audit is insufficient color contrast. Muscle map encodes volume by color alone, and the app ships in 1 language with no published a11y statement.

Growth

Real, specific problem — weekly per-muscle volume vs MEV/MAV/MRV — that Hevy and Strong don't grade. Clear segment, clear wedge. Ceiling is the volume-nerd niche, not mass market.

Improvement areas

Homepage design lags the app: blurry gradient, weak nav, small CTA
Muscle map encodes volume by color alone; add a non-color indicator
No SPF record and no published security/compliance documentation
Only 1 App Store rating and 1 language — thin proof and reach

Design & Usability

Gryper's app UI is the strong half: a dark navy interface with green positive deltas, a front/back muscle heatmap with a readable red-to-grey legend, and session cards that pack volume, sets and planned-vs-completed without clutter. The website is the weak half — a blurry purple cosmic gradient behind white text, a nav with no active states, and a small 'Get the app' pill competing with four links. Usability is built around a short loop: one tap per set, last session's numbers pre-filled, rest timer auto-starting, offline save with sync on reconnect. Hevy CSV import and CSV/JSON export make switching cheap. The gap is verification — one App Store rating means nobody has independently confirmed the onboarding actually feels this fast.

Speed & Security

Speed is the standout measured result: Lighthouse mobile 97/100 with LCP 2.5s, CLS 0 and TBT 15ms, desktop 98/100. The offline-first claim backs it up architecturally — sets save locally and sync when signal returns, so logging never blocks on a network round trip. Security is solid for the stage: HTTPS enforced with HSTS, CSP, frame protection, X-Content-Type-Options, Referrer-Policy and Permissions-Policy, 11 of 12 probe points. The miss is SPF, and there is no SOC 2, ISO, pen-test or bug bounty published. No account required to start trims the credential surface, but privacy policy depth wasn't verifiable from the collected evidence.

Accessibility & Growth

Accessibility scores 97/100 on Lighthouse with a single failing audit: insufficient background/foreground contrast. That's a real, fixable flaw and it sits on the marketing site, not the app. The bigger structural concern is the muscle map encoding volume status by color alone — the legend helps, but colorblind lifters get less signal than everyone else. The app is localized in one language and publishes no accessibility statement. Growth is the interesting question: Gryper names a problem Hevy and Strong genuinely don't solve — whether your weekly volume per muscle hit MEV, MAV or MRV — and aims it at intermediate-to-advanced lifters and strength athletes who already track this in spreadsheets. That's a real wedge with a real segment. The ceiling is the volume-obsessed niche; it is not a mass-market social app, and it shouldn't try to be.

Conclusion

Gryper's bet is that serious lifters care more about whether their chest week was enough than about another social feed. The evidence supports the bet: a specific problem, a differentiated map, fast logging, and clean data export. What's missing is proof at scale — more ratings, an accessibility pass on the color encoding, and a homepage that looks as good as the app inside it. Ship the Android beta, fix the contrast, and let the lifters do the marketing.

How we score

Alternatives comparison

Named competitors, point by point. Nobody paid to appear here or to be left out.

	Gryper	Hevy	Strong
Muscle-specific volume heatmap	Yes — front/back map with per-muscle volume grading	No	No
MEV/MAV/MRV volume landmark guidance	Yes — grades each muscle against research landmarks	No	No
Offline logging with sync	Yes — sets save locally, sync on reconnect	Partial	Yes
Estimated 1RM tracking	Yes — Epley e1RM with trend line	Yes	Yes
Social features / community feed	No	Yes — feed, follows, routines sharing	No
Data import from other apps	Yes — Hevy CSV import, CSV/JSON export	Yes — CSV import/export	Yes — CSV export
Platform availability	iOS; Android in closed beta	iOS and Android	iOS and Android