Black & White Studio Black & White Studio ← Back to studio

Field notes from the studio

Practical writing on offline-first Android, business process automation, and shipping software that survives a power cut.

Guide · Restra

Hotel and restaurant software for small properties in Bangladesh: a buyer's checklist

What to test in a 15-minute demo, the questions vendors dodge, and the red flags that predict abandonment six months in — usable against any vendor's demo, including ours.

2026-10-037 min read
Guide · Parking

Where parking money disappears: a practical audit for building owners

Six specific places parking revenue leaks, how to measure each one without buying anything, what to fix in what order — and why the boom gate you're about to buy won't help.

2026-08-095 min read
Explainer · Ihsan

Why prayer time apps disagree with each other (and with your mosque)

Two apps, two Fajr times, same city. Solar angles, Asr schools, high-latitude rules and safety margins explained in plain language — plus the one setting that ends the app-switching.

2026-08-095 min read
Opinion · Engineering

Offline-first isn't a feature in Bangladesh — it's the requirement

Every demo has wifi; the basement doesn't. What offline-first actually means, the four decisions that make it work, what it honestly costs to build, and the five questions to ask a vendor.

2026-08-095 min read
Guide · GoNStay

Booking travel in Bangladesh online: what the big OTAs miss

Houseboats, ship tickets, hill resorts and visas were never connected to the global booking platforms — and won't be. Why the inventory splits in two, how to book the unconnected half, and the six checks to run before you pay anyone.

2026-08-0911 min read
How-to · Arduino Remote Studio

How to control an Arduino over Bluetooth from your phone — without writing an app

The part of every Arduino tutorial that quietly assumes a controller you don't have. A no-code path for HC-05, ESP32 and WiFi projects — joystick, buttons, live sensor data, and the safety details that separate "demo" from "drivable".

2026-06-2010 min read
How-to · FundNest

How to digitise a Somiti's record keeping (without ditching the register)

A practical walk-through for cooperative society organisers: what to move first, what to keep on paper for now, and how to avoid the three mistakes that turn a digital switch into a disaster.

2026-06-209 min read
Comparison · TripLedger

Offline expense splitter vs Splitwise: which is right for your group trip?

If your trip goes through Sundarbans, Sajek or the hills of Bandarban — your expense app is going to lose signal. Here's how offline-first apps actually compare.

2026-06-207 min read
Explainer · Alarm Mate

Why your phone alarm doesn't wake you up (and what to do about it)

The science of swiping alarms off without remembering, the specific app design that fixes it, and the 8-point checklist for an alarm you can actually trust.

2026-06-208 min read
How-to · RideCare

Vehicle logbook apps in 2026: what to actually track

Most vehicle logbook apps over-track. A practical list of what's worth recording for motorcycles and cars — and what's just noise that gets abandoned in week three.

2026-06-209 min read