Planning a React Native upgrade? See what to assess, test, and budget for, with lessons from Petadev’s Expo SDK 48-to-52 upgrade of Trinity Guard.


React Native App Upgrade: What to Check First

An outdated app does not automatically need a rebuild. Our Trinity Guard upgrade shows what to check first, why navigation became the biggest challenge, and how to plan testing before release.

Upgrading an Outdated React Native App: What to Check Before You Start

How Petadev built Ostva, a US rental marketplace: React Native apps, owner-approved bookings, Stripe Connect payments, identity checks and a web admin panel.

Marketplace App Development: Lessons From Ostva

How we built Ostva, a US rental marketplace app, with React Native. Practical lessons on booking approvals, Stripe Connect payments, identity verification, and deciding what belongs in the first release.

Marketplace App Development: Lessons From Building Ostva

How Petadev works with agencies as a white-label or visible mobile development partner: scoping, pricing, client communication, code ownership and handover.

White-Label Mobile App Development for Agencies

Your client wants an app and you don't have a mobile team. Here is how we work behind agencies: what we take on, who talks to the client, how we price, and what you get at handover.

White-Label Mobile App Development: How We Work With Agencies

What does your app need after launch? Learn how maintenance, warranty fixes, hosting, and feature updates work and what to agree on with your development team.

Mobile App Maintenance: What Happens After Launch?

An app can need work even when you haven't requested a single new feature. Here's how we handle maintenance, warranty fixes, hosting, and ongoing development at Petadev.

What Happens After Your App Launches? Maintenance, Updates, and Ownership

How Petadev runs Trinity Guard across two AWS regions and a dedicated server. One codebase, independent databases, staged deployments.

Multi-Region Architecture on AWS: A Three-Region Case Study

Multi-region has a reputation for being complex. Most of that comes from keeping data consistent across regions, a requirement Trinity Guard doesn't have. Here's what we built instead, and where the approach stops working.

How we run Trinity Guard across three regions on AWS and beyond

Changing app developers? Learn what to check before a handover, when a rebuild makes sense, and how Petadev assesses and takes over existing apps.

Taking Over an Existing App: A Handover Guide

Switching development teams can put years of work and a live product at risk. Learn what a new team needs to take over your app, how to evaluate the existing code, and when selective rebuilding makes sense.

Taking Over an Existing App From Another Development Team

How much does mobile app development cost in 2026? See current market benchmarks and the technical decisions that have the biggest impact on the budget.

Mobile App Development Cost in 2026: What Drives the Price?

Two apps can have the same number of screens and still require radically different budgets. The reason is usually what sits behind the interface: backend logic, permissions, payments, integrations and the tools needed to operate the product.

Mobile App Development Cost in 2026: What Actually Drives the Price?

Your business model affects payments, permissions, onboarding, admin tools and infrastructure. Here’s how business decisions become software requirements.

How Your Business Model Shapes Software Architecture

A marketplace, subscription product and B2B platform can look similar on screen while requiring completely different systems underneath. The reason is simple: the business model is part of the technical specification.

Your Business Model Is a Technical Requirement

A practical 2026 guide to evaluating app development companies: what to verify, what to ask, how to compare proposals, and which red flags matter.

How to Evaluate a Mobile App Development Company 2026 Guide

A polished portfolio and a competitive quote tell you less than you might think. Here’s a practical framework for evaluating who will actually build your product, how they make decisions, what you should own, and what happens after launch.

How to Evaluate a Mobile App Development Company Before You Hire One

How Petadev turned decades of real-world security experience into Trinity Guard, building its mobile app, web platform, backend, cloud infrastructure and AI.

Trinity Guard Case Study: Custom Security Software Development | Petadev

How do you turn decades of real-world security experience into software that actually works in the field? Trinity Guard started with a practical patrol-verification problem and grew into a mobile and web platform with GPS and QR checkpoints, scheduling, AI-assisted fraud detection and international deployment.

Building Trinity Guard: Turning Real-World Security Experience Into a Digital Patrol Platform

Native or cross-platform? Compare performance, cost, hardware access, maintenance, and long-term trade-offs to choose the right approach for your app.

Native vs. Cross-Platform App Development: How to Decide

Native or cross-platform is one of the first decisions most teams face when planning a mobile product, and one of the most oversimplified. The right answer depends far less on which framework is currently popular than on what the product actually has to do, how deep it reaches into the hardware, how much performance it demands, and who maintains it over the next three years.

In this guide we break down where cross-platform makes sense, where native still has the advantage, and the questions that usually settle it.

A US founder spent years planning his platform, then had to choose who would build it. He picked a team in Central Europe. Here's the evaluation, the working rhythm, and why the time difference never became a problem.

Choosing a development partner from 4,700 miles away: how Ostva got built

Most articles about offshore development argue a position. This one doesn't. It's an account of how one founder made the decision, what the working relationship actually looked like week to week, and what he'd tell someone considering the same thing.

Thomas Novoszáth had been planning Ostva for years before a single line of code was written. He'd refined the concept, worked through the mechanics, and reached the point every founder eventually reaches: he needed someone to build it.

That's where the hard part started.

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