Comparison

Hey Trainer vs Build

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Hey Trainer

Log your workouts hands-free by speaking your sets aloud. The app uses voice recognition to automatically record exercises, reps, and weight. Get workout feedback, generate routines, and track your progress over time.

Highlights
  • Hands-free voice logging
  • Natural language command parsing
  • Cardio tracking
  • Voice enrollment for security
  • Workout feedback and analysis
  • Automatic routine generation
  • Cloud backup and sync
Features
Read full description

LIFT. HEY TRAINER. LOG. REPEAT. Hey Trainer is the workout log you never have to touch. Say your set out loud — "bench press, 185 for 8" — and it's parsed, structured, and on your feed before you're back under the bar. No tapping between sets, no sweaty screens, no losing count. TRY IT BEFORE ANYTHING ELSE The app opens straight into a short voice demo: speak a few sets, watch them land as a real workout. When you're done, create a free account and every feature is unlocked for 7 days — no payment method needed, nothing to cancel. HANDS-FREE, FOR REAL • Say "Hey Trainer…" from across the rack — the wake word listens so you don't have to touch your phone • Natural language, not commands: "5 more reps", "3 sets of deadlifts at 100 pounds", "same weight, 8 reps" • Cardio too: runs, rows, intervals — distance, time, or calories • Voice enrollment means only YOUR voice triggers it in a loud gym A TRAINER THAT PAYS ATTENTION • After each workout, get honest feedback on volume, rest, and intensity — movement by movement • Ask for a routine and the trainer builds it: "Hey Trainer, create an upper body workout" • Targets from your routines appear next to what you actually lift YOUR TRAINING, KEPT • Every set on a calendar — streaks, history, personal records • Cloud backup and sync across your devices • Your data stays yours: export everything, delete anytime SUBSCRIPTION DETAILS Hey Trainer Pro: $9.99/month or $59.99/year, after a 7-day free trial. Payment is charged to your Apple ID account at confirmation of purchase. Subscriptions auto-renew unless cancelled at least 24 hours before the end of the current period. Manage or cancel in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://heytrainer.ai/policy.html Requires a microphone. Voice audio is processed in the cloud to parse your sets and is auto-deleted from processing logs within 14 days.

About

Build

Log your weightlifting sets and reps using voice commands in seconds. Import workout routines from photos and track your progress with detailed charts and timers. Works offline and syncs across devices.

Highlights
  • Voice logging for sets and reps
  • Import routines from photos
  • Progress tracking charts
  • Rest timers with notifications
  • Plate calculator
  • Offline functionality
Features
Read full description

Build is the workout tracker you talk to. VOICE LOGGING Hold the mic and say "225 pounds, 5 reps." The set is logged before you rack the bar. IMPORT A ROUTINE FROM A PHOTO Photograph any program — a coach's sheet, a screenshot, a post you saved — and Build turns it into a routine you can train from. TRAIN WITH FRIENDS Follow your gym friends, react to their PRs, and set shared challenges. See who's training right now and lift alongside them. EVERYTHING ELSE • Full history, progress charts, and personal records • Routines you can organize into folders and reorder • Rest timers, plate math, and warm-up sets • 340+ built-in exercises with demos, or add your own • Goals, challenges, and a friends leaderboard • Apple Watch app, and workouts sync to Apple Health • Bring your history over from Strong with a CSV import BUILD PRO Build is free to use. Pro adds unlimited voice logging and unlimited photo imports, plus every future Pro feature: • $2.99 per month • $19.99 per year • $59.99 once, for lifetime access Subscriptions begin with a 3-day free trial and renew automatically unless cancelled at least 24 hours before the period ends. Manage or cancel any time in your App Store settings. The lifetime purchase is a one-time charge and does not renew. Privacy Policy: https://usebuild.app/privacy Terms of Use: https://usebuild.app/terms

Screenshots

Hey Trainer4 screens
Build4 screens

Verdict

The call

The clearest difference is update cadence: Hey Trainer at every 2 days against Build's every 9 days. Build's advantage is ratings volume (25 vs 1). On price, rating, review sentiment and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Hey Trainer sells 2 in-app purchases, starting at $9.99 per month and Build sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Hey Trainer against 5.0 for Build. That said, the two scores are not equally well evidenced: Build has 25 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Hey Trainer ships an update every 2 days, Build every 9 days. Both last shipped on October 24, 2026.

Scorecard2 real differences · 8 level
Hey Trainer versus Build: the parameters behind the verdict, then further details
ParameterHey TrainerBuild
PriceFreeFree
Rating5.0 (1 ratings)5.0 (25 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings125 — better
Update frequencyEvery 2 days — betterEvery 9 days
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, iPad, Apple WatchiPhone, iPod, Apple Watch
Requires iOS16.015.1 — better
Further details — not scored
Size198 MB70 MB
Age rating4+4+
Developeri18n LLCSawdust Ventures LLC

Customer experience

Hey Trainer

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Build

All ratings21 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews9 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Hey Trainer

Subscriptions2
  • Pro Monthly7 Days trial$9.991 Month
  • Pro Yearly7 Days trial$59.991 Year
3 purchases

Build

Subscriptions2
  • Build Pro3 Days trial$2.991 Month
  • Build Pro3 Days trial$19.991 Year
One-time1
  • Build Pro Lifetime$59.99

Questions

Is Hey Trainer free?
Hey Trainer is free to download, with in-app purchases available.
Is Build free?
Build is free to download, with in-app purchases available.
Which has better reviews, Hey Trainer or Build?
Hey Trainer and Build are both rated 5.0 out of 5 on the App Store, from 1 and 25 ratings respectively.
Do Hey Trainer or Build have ads?
Neither Hey Trainer nor Build shows ads.
Which is updated more often, Hey Trainer or Build?
Hey Trainer ships an update every 2 days, and Build every 9 days. Most recently, Hey Trainer was updated on October 24, 2026 and Build on October 24, 2026.

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