Taking 3 founding clients this quarter Singapore · --:-- SGT
Welcome to Keystone Devs

What would you like to fix first?

We build software that fixes the problems every growing business hits: missed appointments, bookings lost in WhatsApp, unpaid invoices and hours of copy-paste. For clinics, tuition centres, service firms, shops and founders. Fixed price, live in 6 to 8 weeks.

Founding offer
S$3,200Full business system for founding clients
6–8 wksFrom first workshop to go-live
Selected work · Optometry

VSMS takes pop-up eye-screening events off paper, with a live queue that keeps working offline.

VBuilt in 4 weeks · 4 sprints · 2026
FoundingS$3,2003 slots
Selected work · Optometry

VSMS: a screening event on one live screen.

An eye-care company runs pop-up vision-screening events. Paper forms meant writing the same details twice, nobody could see the queue, and results were typed into a spreadsheet afterwards. VSMS lets registration, every screening station and the final review work from one live system, even when the venue Wi-Fi drops. Aarya led the planning and built most of the backend and core systems, working with a small team.

Client
Private eye-care company, Singapore
Delivered
MVP · 2026 · 4 weeks, 4 sprints
Scope
QR registration, live station queue, screening results, review and referrals, offline sync, staff roles, audit log
Built to
Replace paper forms and after-event spreadsheets with one live system

Interactive demo. Click around the screen.

vsms.app / hall-b / event

Community eye screening

Hall B

Online

Illustrative screen based on VSMS. Names and figures are made up.

Live demo

Click through a real system.

A working front-desk system for three sample businesses: an optical shop, an aircon servicing firm and a tuition centre. Click around the way your staff would. No sign-up.

Pricing

Fixed prices. In writing.

Every engagement starts with a one-page scope listing what is and isn't included. The price you sign is the price you pay.

S$500Discovery Sprint, from · 1 week, credited to your build
S$1,500Automation Quick Win, from · 1 to 2 weeks
S$4,200Business System Build, from · founding rate S$3,200
S$150Care Plan, from · per month after launch
S$15,000Custom Platform, from · 10 to 16 weeks, for bigger builds like VSMS · See what's included
Full pricing, the estimator and how a build runsEvery package, a 30-second price estimate and the week-by-week plan.
About

You work with the builder.

Keystone Devs is led by Aarya, who runs every project personally from the first workflow session to launch and support. Trained across the full software development lifecycle, with a background in project management and feasibility studies, and the planning lead and main backend developer on VSMS.

One point of contact

The person on your first call is the person writing your system. Nothing gets lost in a handoff.

Scope before code

We agree in writing what's in and out before any work starts. That's what keeps a fixed price fixed.

Few projects at a time

One or two builds at once, so yours gets full attention and a real deadline.

Start a project

Tell us what you'd like to build.

Answer a few questions, about two minutes. We research your setup before we call. If software isn't the answer, we'll say so.

  1. 2 minutesYou send the brief

    Your business, the problem and what a good result looks like.

  2. Same dayWe do the homework

    We study how businesses like yours run and sketch a first approach.

  3. Within 24 hoursA 15-minute call

    Ideas, a rough price and next steps. No obligation.

  4. After the callFixed quote in writing

    A one-page scope with the price you will pay.

Book a free 15-min call
Prefer to message? aarya@keystone-devs.com Singapore · on-site visits island-wide