Case studies: apps we have built
Usatek's own apps, published on Google Play and the App Store. For each one we explain the problem, the solution and the public store data.
ColorClick, paint visualizer
An Android and iOS app with more than 3,000 colours, simulation on photos, an A/B comparison and a paint calculator.
Sector: paint and home decor
Read the ColorClick case study
Exam preparation apps
OPE Osakidetza Test and OpeTest Sanidad: syllabus, quizzes with instant feedback and mock exams, on Android and iOS.
Sector: education and training
Read the exam prep apps case study
Apps against scams and phishing
ScamSentry, Paso seguro and TrustLens help people check suspicious messages, links and QR codes.
Sector: consumer cybersecurity
Read the scam detection case studyGoogle Play and App Store data checked on 20 October 2026.
Want your app to be our next case study?
Tell us about your project and we will send you a proposal with features, timeline and budget.