Software design & engineering
We build software we'd put our name on.
Sandbox Digital Labs is a small studio designing and engineering custom web and mobile products. We hold client work to the same bar as our own — starting with PromptCept, currently in testing.
How we work
From problem to product, in view the whole way
- Define the problem.We start with who it's for and what success looks like — not a feature list.
- Design end-to-end.Interface and data model are shaped together, so the product holds up under real use.
- Build in the open.Small, visible increments — you see progress, not a black box until launch day.
- Ship, then iterate.We treat launch as the start of the feedback loop, not the finish line.
Our first product
PromptCept
From concept to prompt. PromptCept turns rough ideas into clear, ready-to-use prompts for ChatGPT, Claude, Gemini, and Grok — privately on your device.
Currently in testing for iPhone and Android. No account, ads, analytics, or cloud prompt processing — read the privacy policy →
Contact
Tell us what you’re building. We’ll respond within 1–2 business days with next steps.