Mobile Apps
Native iOS and Android apps, or cross-platform in Flutter, from concept to App Store. Structured goals, streaks, dashboards: we have shipped them all.
Mobile app developmentGreek software house, Athens
Scalable software, built with precision.
Custom software for startups and enterprises, from fast MVPs to secure, compliance-grade platforms at scale. 22+ shipped products, platforms serving 1M+ users, built with precision at every stage.
Trusted by
What we build
End-to-end / Design / Ship / SupportWeb Platforms
Full-stack platforms serving million+ users: assessment systems under HIPAA and FERPA, event management, booking portals. React, Angular, .NET, cloud-native.
Web platform developmentGames & Real-Time 3D
Real-time 3D in Unreal Engine 5 and C++: games for mobile and desktop, plus visualisation, simulation and interactive experiences. Custom touch controls, in-game economies, tiered progression. Shipped on Steam, the App Store and Google Play.
Unreal Engine 5 developmentSelected work
22 public projects + internal systems for large organisations
BIMAS-3
The Behavior Intervention Monitoring Assessment System (BIMAS-3) measures behavioral functioning and social-emotional skills in children and adolescents from pre-K to age 18, for universal screening and progress monitoring.
Dyslexia Screener
School dyslexia screening platform with multi-role workflows and follow-up monitoring for at-risk learners.
BASI Org
The Basic Achievement Skills Inventory-2 is a series of norm-referenced and formative achievement assessments. The Comprehensive version gives a detailed evaluation of academic skills for grades 3-12.
Triaena Forms
Event platform with a visual form builder, conditional logic, online payments and scientific-abstract submission for conferences.
Triaena Members
Meeting-room reservation portal with real-time availability, booking history and full admin oversight.
iGrow Goals
SMART-goal iOS & Android app: habit streaks, accountability partners, milestone badges and visual progress dashboards.
SEL Platform
Social-emotional learning delivery and management for schools: lessons, cohorts, forms and parent communication flows.
iGrow MHFA
Mental Health First Aid reference app for iOS and Android: five condition modules, conversation guides and a crisis-resource directory.
BASI Schools
The BASI-2 Survey assesses academic skills quickly and reliably, evaluating verbal and math competencies for students ages 8 to 18 and adults up to 80, in about 25 minutes per domain.
CAWS
The Children and Adolescent Wellness Scale assesses children's social-emotional competencies across 10 psychological domains. Through the web application, schools set up universal screening windows to assess students by teachers, parents and students.
PAWS
The Preschool Affective Wellness Scale (PAWS) assesses the social-emotional competencies of preschool children. Through the web platform, schools run universal screening by teachers and parents to identify support needs and monitor intervention.
K-SEP
Early-childhood social-emotional proficiency assessment with dedicated rater and parent workflows.
JWS
The Journey to Wellness Scale (JWS) is an 80-item social-emotional learning (SEL) skills inventory that assesses competencies across 10 psychological domains.
ECF25
Official website for the 25th European Conference on Fracture, held in Greece, with a live CMS so the client updates content without deploys.
MWOConf
Official website for an international Wine & Olive Oil symposium at the International Olympic Academy in Ancient Olympia, CMS-managed.
Xtypos
XTYPOS online, a Greek news portal for local government and the municipalities of Attica, with a live feed of political and civic news.
Syneidisi
Syneidisi, the online edition of a daily local-government newspaper, publishing news and analysis Monday to Friday.
Athinaika Nea
Athinaika Nea, an Athens news portal with continuous coverage of politics, society and life across the city.
Free News
Free News, a regional news portal for Eastern Attica, delivering daily headlines across politics, society and local affairs.
Golfinopoulos
Episkevastiki Golfinopoulos, an Athens firm specialising in apartment-building facade repairs without scaffolding and terrace waterproofing, in business since 1991.
Aidhera
Aidhera, a psychotherapy practice offering group and individual therapy and seminars, with an online presence built around its theme of connection, understanding and change.
Social Meme
Meme-sharing social platform for iOS and Android, with every meme format, badge achievements and monthly community leaderboards.
Building something like these?
How we work
Discovery
You tell us your goals, constraints and budget, and we reply within 1-2 business days.
Fixed proposal
A written proposal: exact scope, fixed price, delivery plan. Anything outside the scope is priced in writing before work starts.
UI/UX design
Wireframes and screen designs that you approve before development starts.
Build
Weekly demos and feedback rounds. Performance, security and maintainability from day one.
QA testing
Testing before every release: on real iOS and Android devices for apps, and in all major browsers for web platforms.
Launch & support
Store submission for apps or production deployment for web, a bug-fix warranty after launch, and a monthly support and maintenance plan priced up front.
About SepeTech L.P.
Every line of code is intentional.
SepeTech is an Athens software company that designs, builds, tests and supports mobile apps and web platforms, with UI/UX design, engineering and QA under one roof. Our work runs in production: assessment platforms serving thousands of educators, event systems processing real payments, and apps on both stores.
- Precision
- Optimized for performance, security and maintainability, from the first commit.
- Versatility
- Mobile, web and gaming under one roof, the right tool for every challenge.
- Commitment
- Deadlines met, communication clear, quality never compromised.
Questions
Frequently asked
How much does a custom app or website cost?
Indicatively: a simple app or MVP costs €3,000-10,000, an advanced app or platform €10,000-30,000, and a large or regulated platform €30,000+ (excl. VAT). Your project gets one fixed, written price before any work starts, covering design, development, testing and launch.
Are there hidden or extra costs?
No. The fixed price covers everything in the agreed scope. Third-party costs, such as hosting, Apple and Google developer accounts, SMS, maps or payment fees, are listed separately in the proposal before you sign, and any change you ask for is priced in writing before work starts.
How long does a project take?
Most projects ship in about 3-6 weeks, depending on scope. You get a written delivery plan before we start and weekly demos while we build.
Who owns the code and the IP?
You do. You get full ownership of the source code and intellectual property on delivery, with no lock-in.
Can you take over an existing or half-finished project?
Yes. We regularly pick up codebases from other teams, audit what is there, and continue from it, whether that means fixing, finishing or rebuilding. You get an honest assessment before any work starts.
Do you build games and real-time 3D in Unreal Engine 5?
Yes. We are one of the very few teams in Greece working commercially in Unreal Engine 5 and C++. We have shipped games on Steam, the App Store and Google Play, and the same real-time 3D stack covers visualisation, simulation and interactive experiences.
Do you offer support and maintenance after launch?
Yes. Every launch includes a bug-fix warranty on the agreed scope. Ongoing support and maintenance (updates, monitoring, fixes and planned improvements) is available as a monthly plan, priced up front in your proposal.