01
Workout player
An animated SVG ring counts reps and seconds, a sound marks each rep, and the next exercise starts by itself. Progress is saved on the server, so a session can continue on another device.
Case study · 09 / 09
Samtrening Online
White-label personal training SaaS
Coaches build plans from an exercise library, clients train in the browser with a timer, and the platform sells packages, takes payments and issues invoices — for many studios, each on its own branded subdomain.
Partner
Samtrening
Industry
Fitness · SaaS
Platform
Web app, multi-tenant
Our role
Product engineering, end to end
The product
What it does
Trainers and dieticians prepare workouts and diets; clients follow guided sessions on their phone, track body measurements and buy packages. Every studio runs on the same instance under its own subdomain and branding.
Our part
What we built
A Laravel 7 application with Blade and jQuery, media on S3 behind signed URLs, PayU and Przelewy24 payments, and a Docker pipeline through AWS CodeBuild and ECR to Elastic Beanstalk.
Under the hood
The hard parts
- 01
Multi-tenant by subdomain
Routing on {organisation}.domain, middleware that checks membership and maps every controller action to a policy across admin, trainer, dietician and client roles.
- 02
Orders in one transaction
A snapshot of products at purchase time, passes split into services to deliver, an invoice with monthly numbering and an emptied basket — all or nothing.
- 03
Payments that provision access
PayU webhooks with signature verification add training credits and e-mail the client a link to set their password.
- 04
Documents and media
Exercise media through time-limited signed URLs, PDF invoices with amounts in words and bulk export to ZIP, and surveys targeted by gender and age.
The outcome
Studios sell and deliver online training under their own brand — the platform handles the rest.
Inside the product
6 screens, explained
Demo data · click any screen to enlarge
02
Training with phone in hand
The same player at 390 px — pause and resume handled in the client.
03
Plan builder
Exercise library with live search, variants and media preview on the left; the plan on the right, reordered by drag and drop. Saving books a training credit and notifies the client.
04
Workouts and their status
Two independent statuses per workout — prepared by the coach, completed by the client — filtered to the studio and the signed-in role.
05
Automatic invoices
Created from orders with NNN/MM/YYYY numbering per studio, overdue detection, PDF download and ZIP export.
06
Body measurements
Circumference history and current measurements drawn on a body outline.
Stack
App
- Laravel 7 / PHP 7.3
- Blade
- jQuery UI
- Bootstrap 4
- SCSS
Data & files
- MySQL
- AWS S3 (signed URLs)
- dompdf
Payments
- PayU
- Przelewy24
Delivery
- Docker
- AWS CodeBuild
- ECR
- Elastic Beanstalk
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