Output Capture vs 4TRAINER
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Output Capture
This app, paired with a wearable sensor, provides comprehensive athlete performance analysis. It tracks strength, speed, power, and mobility with reliable and valid data, streamlining the entire assessment process for training optimization and return-to-play protocols.
- Comprehensive athlete testing
- Strength, speed, power, mobility tracking
- Reliable and valid data
- Streamlined data management
- End-to-end solution
- Machine-learning algorithms
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Output Sports is your Swiss army knife to truly understand athletes and optimise their performance // Anytime, anywhere. Paired with an Output V2 Inertial Measurement Unit (IMU)*, the Capture app offers unparalleled versatility, scalability and usability without sacrificing accuracy and validity, making it the perfect tool for assessing athlete performance. With Output’s machine-learning algorithms you have the ability to test and track multiple components of athletic performance. * Use of the Capture app requires the wearable V2 Capture IMU sensor to function. The Capture app requires iOS 15.0+. - End-To-End Solution One simple, portable, easy to use tool that can be used for comprehensive athlete testing and tracking of strength, speed, power, mobility & more. Whether integrating it into training programme optimisation, developing return to play assessments, or driving intent. - Reliability and Validity Reliability and validity is at the forefront of what we do at Output. Our state of the art algorithms have been developed in biomechanics labs and have exceptional agreement with gold-standard research. - Unified Data No more reliance on cumbersome equipment producing difficult to manage silos of data. Output streamlines the whole data capture, management and decision-making process. - Grown with our community Our technology has been co-developed with elite sporting partners & spans >8 years of research and development. Our community continues to grow everyday. You can check out some of our user stories on our website at https://www.outputsports.com/.
4TRAINER
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You got into personal training to coach people. Your job should not be to chase unpaid invoices, rebuild session spreadsheets, or piece together what a client did three weeks ago from a WhatsApp thread. But that's what most of your admin ends up being. 4Trainer is built to fix that. One platform that keeps your clients, sessions, programs, invoices, and revenue in sync - so you always know what you've sold, what you've delivered, and what you're owed. What's inside: - Sessions & invoicing - bill clients, log session credits, and track exactly what's been paid and what's still outstanding. No more end-of-month guesswork. - Your calendar - schedule sessions, mark attendance, and see your full week at a glance. - Programming - build templates and training plans from your exercise library, log sets, reps, and weight each session, and get flagged automatically when a session's been repeated so your programming stays fresh. - Revenue tracking - log income and expenses and see how your business is actually performing. No social feeds. No gamification. No fitness influencer nonsense. Just a clean, fast tool built by a trainer, for trainers who treat this like the business it is. *Founder's note: I built 4Trainer because nothing else did what I needed. My entire business runs on it - and now yours can too.* *Subscription required for full access. 14-day free trial included with monthly plan. Monthly, 3-month, 6-month, and 12-month plans available. Payment is charged to the Apple ID at purchase confirmation. Auto-renews unless cancelled at least 24 hours before period end. Manage subscriptions in Apple ID Account Settings. Please refer to our Terms of Use: https://4trainer.io/terms | Privacy Policy: https://4trainer.io/privacy.
Screenshots
Verdict
The clearest difference is in-app purchases: Output Capture at none against 4TRAINER's 4. 4TRAINER's advantage is update cadence (weekly vs fortnightly) and iOS requirement (15.0 vs 17.0). On price, ads and device support 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
Both are free to download. 4TRAINER sells 4 in-app purchases, starting at $49.99 per month. Output Capture asks for nothing beyond the download.
Output Capture ships an update fortnightly, 4TRAINER weekly. The most recent releases landed on September 16, 2026 and September 22, 2026 respectively.
| Parameter | Output Capture | 4TRAINER |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (12 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 12 — better | — |
| Update frequency | Fortnightly | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 98 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | Output Sports | Racquel Nina Dennison |
In-app purchases
Output Capture
No in-app purchases
4TRAINER
- Standard monthly subscription14 Days trial$49.991 Month
- Three month subscription$129.993 Months
- Six month subscription$244.996 Months
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- Annual Subscription$449.991 Year









