Personal trainer, remote video review, the gym mirror, or a live AI coach on your phone — each checks your form differently, and each is honest about something the others aren't. This page compares the approaches (including ours), grounded in what RightRep actually measures.
What each approach is, in its own words — before the side-by-side.
A qualified coach standing next to your rack: watching every rep, adjusting your stance by hand, writing your program and holding you accountable. The gold standard for attention — and usually the largest recurring fitness expense of the four.
You film a set and send it to an online coach, who replies with written or annotated feedback — hours or days later. Cheaper than in-person and genuinely expert, but the feedback arrives after the set is over, and usually per submission or per monthly plan.
The mirror between sets, or recording yourself and comparing against tutorial videos. Free and always available — but you can't watch yourself mid-rep, and your own eye grades its own homework.
Prop your phone, start a session, and the camera watches the set: 33 body landmarks per frame measured on the device, faults flagged joint-by-joint, spoken cues mid-rep, and a 0–100 score for every completed repetition.
The same six questions, asked of each approach.
| Question | In-person trainer | Video review | Self-check | RightRep |
|---|---|---|---|---|
| When does the feedback arrive? | Live, in the moment | Hours to days after the set | After the set — if you catch it | Live, spoken mid-rep |
| What do you get per rep? | An expert's eye and a verbal cue | Notes on the reps you filmed | Your own judgment | A 0–100 score and the exact rule that failed |
| How objective is it? | Expert, but human — fatigue and bias exist | Expert, reviewing a small sample | Whatever your eye believes | Measured joint angles against the exercise's ruleset |
| What does it cost? | Hourly rates; usually the largest recurring expense | Per submission or a monthly plan | Free | Live form checks free forever; Pro $9.99/month or $99.99/year after a 7-day free trial |
| When is it available? | Booked sessions | Whenever the coach replies | Always | Always — wherever you can prop a phone |
| What does it need from you? | Scheduling and travel | Filming, uploading, waiting | Discipline and an honest eye | Camera placement — angles are measured in the camera's image plane |
Approaches, not brand names: this page compares methods of getting a form check, and names no other product — claims about apps we haven't tested would be marketing, not comparison.
The honest case for the fourth column — grounded in what the app does today.
"Knees out" spoken while the descent is still happening can fix that very rep. Notes that arrive tomorrow can't. RightRep picks one correction at a time by urgency and speaks it — at most every 10 seconds, one tap to mute.
Every completed repetition gets a 0–100 score, and the summary's "Why this score" line names the exact rule that failed. Complete reps only — a cut-short squat doesn't count, so the tally can't flatter you.
The pose analysis runs on the device — the live checks don't upload your set anywhere. Sharing a skeleton-annotated clip is a button you press, not a default.
The 6 a.m. garage set and the 11 p.m. hotel-gym set get the same scorer as a Saturday session with your trainer watching. Consistency is where form actually changes.
The other side of the comparison — because a page that only praises column four is an ad, not a comparison.
A coach writes the plan around your season, your injuries' history and your life. RightRep's AI training plans are generated and guardrailed, but they are not a coach's multi-month periodization — serious competitive programming is still human work.
Physically moving your elbow two inches teaches some positions faster than any cue. A camera measures; a coach's hands correct.
A phone on a stand will not catch a failed bench press. Under a heavy bar, a human spotter is not optional — RightRep is a form coach, not a spotter.
Showing up because a person is waiting for you is a mechanism no app replicates. A coach also reads the bad day behind a sloppy set — the app reads the sloppy set.
RightRep ships 26 bundled Position Profiles and Machine Scan can draft a new one from a photo of a machine — but a coach can watch literally anything you do. Outside profile coverage, film yourself and use a mirror; or tell us what's missing — requests shape what gets added next.
The honest summary: many people do best with both — a trainer for programming and the heavy days, live AI checks for the dozens of sets in between.
What actually happens between "start session" and the summary screen.
An on-device pose model tracks 33 body landmarks per frame. Joint angles are compared against the exercise's Position Profile — its acceptable ranges, phase durations and left/right symmetry tolerances. Occluded joints are never scored: hidden is hidden, not guessed.
Profiles are pure data — 26 bundled exercises today, and Machine Scan drafts a new profile from a photo of an unfamiliar machine that the same scorer then uses. Every cue and every score traces back to a rule in that profile, not to a model's mood.
Per-exercise score trends live in your history next to your load logging — the two together are how you know the weight went up and the form held.
The questions people actually ask before choosing.
No — it's a different tool. A trainer programs, adjusts by hand, spots heavy lifts and holds you accountable; the app measures joint angles, cues mid-rep and scores every completed rep. The strongest setup we see is both: a human for the plan and the heavy days, the app for every set in between.
If your training is general strength and health, the live checks, load trends and AI plans carry a lot of it. If you compete, lift near your limits or carry an injury history, keep the human — the page above explains exactly which jobs stay theirs.
The live form checks, exercise library, history and GPS runs are free forever. RightRep Pro — which lifts the daily AI quotas, adds cloud sync and removes ads — costs $9.99/month or $99.99/year after a 7-day free trial. Coaching rates vary by city and credential and are almost always the larger line.
Timing and coverage. A video review grades the one set you filmed, when the coach replies; RightRep grades every rep of every set you point it at, while the set is still happening — and the summary names the rule behind each score.
No tool can promise that, and we won't. Good technique is one part of safety; load selection, fatigue and your own history are others. RightRep coaches the technique part — it is not medical care, and pain deserves a professional, not an app.
The analysis runs on the device — live-check video is not uploaded. Sharing a skeleton-annotated clip is an explicit action you take; posting to the community feed is opt-in per post.
The skeleton overlay, spoken cues, per-rep scoring and the automatic rest timer — the features page puts the whole live session in context.
Free-forever list, Pro quotas, trial mechanics and billing — every number on this page traceable to the pricing page.
If you coach or review form for a living and something here reads wrong, tell us — this page is meant to be argued with, and gets updated.