Mladen Terzić
Founder & CEO, Codersy
Mladen is the founder of Codersy, where he builds and ships branded mobile apps for beauty salons, personal trainers and gyms. With over a decade in software and e-commerce, he focuses on turning everyday business operations — bookings, scheduling, client management — into polished apps that small businesses can put their own name on.
Best Apps for Personal Trainers in 2026
A practical guide to the best apps for personal trainers — scheduling, workout builders, client tracking and payments — and how to choose the right one.
Turn Your Shopify Store Into a Mobile App: Is It Worth It in 2026?
A practical guide to turning your Shopify store into a mobile app — the conversion case, what Tapcart and other builders cost, and the flat-fee branded alternative.
Free Apps for Personal Trainers: What's Actually Worth It
The best free apps for personal trainers, what their free tiers really include, the hidden catches, and when it pays to upgrade to something you own.
Best Beauty Salon Booking Apps for 2026
A guide to the best beauty salon booking apps for stylists and estheticians — the must-have features, marketplace vs. your own app, and how to choose.
Beauty Salon Appointment Apps: How to Cut No-Shows for Good
How a beauty salon appointment app cuts no-shows with reminders, deposits and smart scheduling — and how to measure the revenue you get back.
Should You Build a Custom App for Your Salon or Gym?
A build-vs-buy guide to beauty salon and gym app development — what a custom mobile app costs, how long it takes, and when the subscription model makes more sense.