BitMask LLP A software product company in Thane, India

We make software
people actually use.

4 products, built and run by a small team. A stock screener, a box of developer tools, an alarm app and a matrimony platform — each one something we wanted to exist, so we made it.

Everything here is ours: designed, built, shipped and supported by the same people.

See the products Contact us

Our products

4 products.
One small team behind all of them.

Each one is live, has users, and is looked after by the people who built it. We handle the updates, the support inbox and the awkward bugs ourselves.

Live on patternsradar.com Web Built in Go + TypeScript

PatternsRadar

NSE stock screener with backtesting

Describe the setup. Get every stock that matches.

Click a scan together or write it out — two views of one query, switchable mid-thought. Over 30 years of split-adjusted NSE dailies, plus the fields most screeners leave out: delivery percentage, futures open interest, and fundamentals as the market knew them on the day.

  • 3,690 instruments, back to 1995. Eighty million daily bars, split-adjusted, so a scan means the same thing in 2004 as it does today.
  • Backtest before you trust it. Run any scan across history and see how the setups it found actually played out.
  • Fields other screeners skip. Delivery percentage, futures open interest and point-in-time fundamentals, all queryable.
  • Works over MCP. Connect Claude, Codex, opencode or any MCP client and scan straight from the agent.
Open patternsradar.com
The PatternsRadar homepage: 'Describe the setup. Get every stock that matches.' with the screener stats below.
Live on hasare.com Web Built in TypeScript

Hasare

Developer tools that run in your browser

A hundred small tools. Zero data leaving your machine.

JSON formatters, encoders, hash generators, image and text utilities — the things you reach for a dozen times a day. Every tool runs entirely client-side, so nothing you paste is ever uploaded, and there is no account to create.

  • 100% client-side. Your input never leaves the browser. Paste secrets, tokens and production data without a second thought.
  • 100 tools and counting. Data, design, dev, finance, image, security, text and web utilities, searchable from one page.
  • No sign-up, no limits. Open the page, use the tool, close the tab. Free, always.
  • Instant. No server round-trip means results appear as you type.
Open hasare.com
The Hasare homepage listing free online developer tools with category filters and a search box.
Live on Google Play Android Built in Kotlin Multiplatform

AlarmNest

Alarm & Location

An alarm for the time — and for the place.

An alarm clock that can also ring when you get somewhere. Draw a radius around a stop, a street or an office, and AlarmNest goes off on arrival or on departure — useful if you tend to sleep past your exit.

  • Location alarms. Ring on arrival or departure, with a trigger radius anywhere from 100 m to 5 km.
  • Easy on the battery. It uses the system geofencing APIs instead of polling GPS in the background.
  • Math puzzles and a snooze jar. Three snoozes a day, then a puzzle to dismiss — enough friction to leave you properly awake.
  • Recurring schedules. Daily, weekly, monthly or yearly, with a plain-English preview of the next ring.
Get it on Google Play
Privacy Terms
AlarmNest mobile application mockups on two smartphones
Live on vivahswapn.com Web Built in Go

Vivah Swapn

विवाह स्वप्न

A matrimony platform for Marathi families.

Built for the Marathi and Maratha community — verified profiles, privacy controls on every field, and search that understands that where a family is from can matter as much as where they live now.

  • Verified profiles. Each profile is checked, and members choose field by field what stays private.
  • Native-place filters. Search by original village or district as well as current city, plus age, community and profession.
  • Bilingual throughout. The whole product runs in मराठी and English, switchable in a tap.
  • Biodata maker and alerts. Generate a shareable biodata, and get new matches by Telegram or email.
Visit vivahswapn.com
The Vivah Swapn homepage

How we work

A product company, not a project company.

Everything we make is ours to design, ship and live with — which changes what we're willing to put out.

01 We use what we ship.

Every product started as something we wanted for ourselves. We're in the support inbox and on the store reviews, and we feel the rough edges before anyone else does.

02 Small team, long horizons.

A handful of people and no outside pressure to grow for growth's sake. Products get to stay around, get maintained, and get better slowly.

03 Boring technology, on purpose.

Go, Kotlin, Postgres, static sites on a CDN. Tools we understand end to end, so that a bug at 2 a.m. is something we can actually fix.

04 Privacy is a feature.

Hasare runs entirely in your browser. AlarmNest keeps location on the device. Vivah Swapn lets members hide any field. We collect what a product needs and nothing extra.

About

A small software company in Thane.

BitMask LLP is registered in Maharashtra, India, and run by a handful of engineers who design, build and support everything you see on this page. There's no sales team and no outsourcing: the people answering support email are the people who wrote the code.

We started with AlarmNest on Android, then Vivah Swapn for the Marathi community, and more recently PatternsRadar and Hasare on the web. Each one is built to be maintained for years, not flipped.

Reach us at hello@bitmask.in.

What we build with

  • Go
  • Kotlin Multiplatform
  • TypeScript
  • Android
  • PostgreSQL
  • Rust
  • Astro
  • Cloudflare

Built in Thane. Used anywhere.

Try one of the products, or write to us about a bug, an idea, or anything else. A person reads every message.

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