Don't train the guess.
Train what the evidence supports.
JumpOnion turns one jump into frame-backed evidence and a human-reviewed next step. If the evidence is not strong enough, we do not force a diagnosis.
Evidence before conclusions · One clear focus for the next practice
A diagnosis has to earn its place.
JumpOnion is designed to be useful without pretending to know more than the video can show.
Evidence before conclusions
A released conclusion must point back to what the video actually supports.
Facts are not interpretations
What happened and what it may mean are kept as two different layers.
No forced answer
When the evidence is not strong enough, JumpOnion says so instead of filling the gap.
A human is accountable
Every released diagnosis is reviewed before it reaches the skater.
From one video to one reviewed next step
See why this conclusion met the evidence standard
A fall can invite many plausible explanations. JumpOnion separates what the video shows from what it cannot establish, then releases only a reviewed conclusion that met the standard for release.
JumpOnion does not treat every computable number as coaching evidence. The result shows only what this video can support.
Anonymized real case · Analysis #xxxx366e (2026-04-03). The result separates known facts, interpretation, and unknowns.
Schedule preview · 7 days
One finding becomes a practice sequence
Upload your own video to see what the evidence supports and what to train next.
Analyze My Jump →Your judgment stays in charge
JumpOnion organizes the evidence and review workflow without replacing the training context only a live coach can know.
Review & Label
Review the supporting evidence, add the context you know from the rink, and decide what is ready to share.
Set the Training Focus
Assign up to 3 drills so the skater sees the next step you approved—not a wall of metrics.
Visible Platform Activity
Activity tiers record sustained review and guidance on the platform; they are not a coaching credential or quality score.
Simple, Transparent Pricing
Monthly plans, cancel anytime. Every plan includes evidence checks, human-reviewed results, and a linked training plan.
L1 Basic
$49/mo
20 coins/mo, 3 daily analyses, 15/30 frames, evidence-backed analysis, human-reviewed results, training plans
Get Started →L2 Pro
$99/mo
50 coins/mo, 5 daily analyses, 15/30 frames, human-reviewed results, training plans, progress comparison
Get Started →L3 Elite
$299/mo
150 coins/mo, 30 daily analyses, 15/30/45 frames, human-reviewed results, full drill library, priority support
Get Started →Not ready to subscribe?
Try Once
$7.99
Full experience: Upload → Evidence Check → Human-Reviewed Result → Training Plan. Includes a 48h review window. Data auto-deletes after 48h—screenshot to save.
Try Now →Pay with card · Apple Pay · Alipay 支付宝 · WeChat Pay 微信支付 (Alipay & WeChat Pay available on Try Once and coin packs)
Frequently Asked Questions
Because a useful answer has to be supportable. If the video does not justify a conclusion, JumpOnion withholds the diagnosis instead of filling the gap with a confident guess.
You can ask a general model for an opinion. JumpOnion's value is the controlled evidence workflow around that opinion: source-frame timing, reviewed annotations, deterministic rules, explicit uncertainty, a released result tied to its evidence, and a repeatable way to compare the next video. The claim is not that GPT cannot comment; it is that an unaudited comment is not yet a coaching-grade result.
Onion Coins are the in-app currency. Each analysis action costs 1–3 coins depending on quality level. Coins are included in your monthly plan, and you can buy top-up packs anytime.
A complete jump review costs 4–7 coins, depending on the analysis depth. The Basic plan supports about 3–5 complete reviews per month; the Pro plan supports about 7–12. Use each review to check one current training priority.
Yes. Cancel anytime from your Account page. Your coins are frozen (not lost) — resubscribe within 30 days to restore them.
Record at normal speed (30fps+), landscape orientation, with the full body visible from 3–5 meters. Avoid slow motion. Trim to about 1 second before takeoff through 1 second after landing.
Video access and retention follow the current Privacy Policy and product retention rules. Use an account you control, avoid adding unnecessary identifying information, and review the policy before uploading a minor's video.
A result is not released just because a model produced it. An authorized reviewer checks source-video timing and whether visible evidence supports the conclusion, then may release, correct, or withhold it. The badge identifies review status and reviewer accountability; it is not a claim that every reviewer holds the same external credential.
No. JumpOnion gives skaters and coaches a second set of eyes: a documented observation, its supporting evidence, and one training focus. Live coaching still owns technique, context, and progression.
Contact us to apply for coach verification. Once verified, you'll get a blue checkmark badge, access to the coach dashboard, and the ability to label student jumps, assign drills, and build your prestige tier.
Prestige tiers summarize platform activity and participation. They are not a credential, a coaching-quality score, or a JumpOnion endorsement, and parents should not choose a coach from the tier alone.
Give the next practice a focus you can trust.
Upload one jump. See what the evidence supports, what it does not, and the next action that passed review.