Just Check

Rescuing And Relaunching A Two-Sided Auto Repair Marketplace

Omnizone took over a stalled auto repair marketplace from a previous team, fixed critical privacy defects, rebuilt payments, chat and notifications, and launched Just Check on the App Store and Google Play, where it holds a 5.0 rating.

Marketplace

Automotive

Cross Platform App

App Rescue

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What Our Early

Adopters Say

Omnizone was a life saver. They helped us launch an app that other renowned devs and agencies couldn't deliver on, after we had wasted $100k+.

Dan

JustCheck Team

The Story BEHIND

Just Check set out to take the stress out of car repairs. Drivers describe a problem, or upload a photo, video or audio clip of it, get an AI-assisted diagnosis, compare quotes from nearby shops, book in-shop or mobile repairs, chat live with the mechanic, approve work as it happens and pay securely in the app. Shops get a steady stream of bookings, digital invoicing and appointment management in one place.

The idea was strong, but the app built by a previous development team wasn't ready for launch. Chat was unreliable, payments didn't separate shop earnings from platform fees, notifications were inconsistent and there was a large bug backlog. Beneath the surface were defects nobody had found yet, including one with serious privacy implications. Just Check came to Omnizone needing a team that could stabilise the product, rebuild what was broken and get it approved on both app stores without delay.

Industry CHALLENGES

Marketplace Payment Complexity

Two-sided marketplaces live or die on getting money to the right place. Every transaction has to be split between the shop, the platform and processing fees, and any mistake erodes trust on both sides. Just Check's existing setup didn't separate what shops should receive from what the platform should keep. Omnizone rebuilt the flow on Stripe Connect so every job is split correctly, shops are paid reliably and the platform fee is collected automatically.

Real-Time Communication At Scale

Drivers and mechanics need to talk while work is happening, because that's how questions get answered and extra work gets approved. The original GetStream chat was poorly implemented and notifications were unreliable, so users missed quotes, bookings and messages. Omnizone rewrote the chat from the ground up and rebuilt notifications across push, SMS and email so every update arrives on time.

Privacy And App Store Compliance

An app that handles audio, photos, location and payment data is held to a high standard by users and by Apple and Google. During a deep audit, Omnizone found a hidden bug that let the app keep recording in the background, a serious privacy risk and a likely cause of rejection. The team traced it to its source, fixed it and verified that recording only happens when a user explicitly starts it.

How We

Delivered

Code Audit & Privacy Remediation

Omnizone began with a deep audit of the inherited codebase to separate cosmetic issues from structural ones. This surfaced hidden defects that had gone unnoticed, including the background recording bug, which was fixed and verified before any new features were built. The audit gave the team and the client a clear, prioritised picture of what needed rebuilding.

Core Systems Rebuild

The team rebuilt the systems the marketplace depends on. Stripe Connect now handles correct payment splitting and shop payouts. The GetStream chat was rewritten for fast, stable conversations. The OpenAI API powers diagnostics that help drivers understand the problem before they book. Google Calendar sync with secure OAuth puts appointments straight into users' calendars, and notifications now run through Firebase Cloud Messaging, Twilio and SendGrid.

Stabilisation & App Store Launch

Omnizone worked through a backlog of 50 to 100 bugs, from UI glitches to broken flows, and hardened the AWS infrastructure behind the app. The team then managed submission to both the App Store and Google Play, working directly with Apple's App Review team to resolve questions quickly and get the app live without prolonged back-and-forth.

Technical
‍details

Mobile Technologies

React Native for iOS and Android, Redux Toolkit for state management

Backend Technologies

Python and Django, PostgreSQL, Redis for caching, AWS Elastic Beanstalk and EC2, S3 and CloudFront for media storage and delivery

Payments and AI

Stripe Connect for split payments and shop payouts, OpenAI API for AI-assisted vehicle diagnostics

Messaging and Integrations

GetStream chat, Firebase Cloud Messaging, Twilio SMS, SendGrid email, Google Calendar API with OAuth, Google Maps API for shop discovery and mobile repairs

Outcomes

Just Check launched successfully on both the App Store and Google Play, followed by a steady run of updates adding itemised invoicing, calendar sync and improvements to payments, notifications and shop tools.

The app holds a 5.0 rating on the App Store, with users highlighting how easy it is to schedule appointments in advance, the upfront pricing and the straightforward payment experience.

Most importantly, Just Check now runs on a secure, stable platform with a clean codebase, correct payment splitting and reliable infrastructure, ready to grow rather than held back by technical debt.

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