We build native software that respects the device it runs on.
DRC App Studio is a one-developer studio building four products for iOS, iPadOS, macOS and the web. Every one of them is local-first, without third-party trackers or dependency bloat.
Four products, one studio
Aviano
Aviation intelligence and live flight tracking
A flight tracker for travelers and enthusiasts. Aviano draws live ADS-B positions on its own map layer, and pushes gate and delay changes to the Lock Screen before the airline app does.
- Real-time ADS-B radar and telemetry
- Live Activities and Dynamic Island
- Predictive delay and gate change alerts
- Global route and aircraft database
Cliff Jumper
Endless pixel-art fall for iPhone and iPad
An endless dive past grumpy birds, rock ledges, storm fronts and drones. Version 3.0, in development now, is a ground-up Swift and SpriteKit rebuild: every run steps at a fixed rate so the same seed always plays the same way, and nothing about your game leaves your own iCloud account.
- Five depth zones, six heroes, three missions
- Daily Drop: one seeded run for everyone
- Game Center leaderboards and achievements
- Art and chiptune audio generated from code
Blackjack Trainer
Basic strategy and card counting drills
A drill built on the full basic strategy matrix — hard totals, soft totals and pair splits against every dealer upcard. You play each hand through to the end rather than answering one prompt, and the trainer remembers the spots you keep getting wrong. Version 3.0 is in development.
- Complete hard, soft and pair-split matrix
- Hi-Lo running count and true count trainer
- Table rules: H17/S17, DAS, surrender, decks
- Shoe simulation and stats stay on device
Numeris
Zero-knowledge personal finance engine
Net worth, cashflow and budgets across every account you hold, encrypted on your device before anything leaves it. The server stores ciphertext it cannot read, and local mode works with no account at all.
- Client-side AES-GCM encryption
- Multi-bank, multi-currency sync
- Local-first speed, optional cloud
- Net worth and cashflow analytics
How the work gets built
Four constraints applied to every release. They rule out a lot of shortcuts, which is the point.
Privacy by architecture
Zero-knowledge stores and local-first data, so personal detail and telemetry stay on the device. No analytics SDK ships in any release.
Native craftsmanship
Written in Swift and SwiftUI for iOS and macOS, with the web surface built to match rather than substitute for it.
Lean by default
Low-latency codebases with a short dependency list. Every third-party package has to earn the binary size it costs.
Independent and unhurried
A boutique studio on solo-developer economics. Releases ship when they are finished, not when a quarter closes.
Behind the studio
DRC App Studio is one developer, Davi Chaves, working across Swift, SwiftUI and TypeScript from Fortaleza, Brazil.
The studio exists because most of the software I wanted on my own devices either didn't exist or came with a tracking SDK attached. Aviano started as a flight tracker I kept wishing for at the gate. Numeris started as a spreadsheet I no longer trusted to a third party.
Cliff Jumper and Blackjack Trainer came first, and both are being rebuilt from scratch in Swift. The rewrites drop the accounts and the servers the old versions leaned on: progress now lives on the device and in your own iCloud, and there is nothing left for the studio to host.
Everything ships when it is finished. There is no roadmap pressure, no investor timeline, and no growth team — which is the only reason a two-person-year feature like client-side encryption is worth building properly.