Tools for developers, data people and small teams.
Biz59 LLC is a small company in New York. We build and run nine products, most of them with one sign-in, and we write about what we see in software, AI and startups.
A database client, plus free data tools in the browser.
iPaid, i Owe: track what you owe and what is owed to you.
Security tools for small sites and teams, with one sign-in.
Short links, QR codes and page-view tracking.
An email router for apps, developers and bots.
Privacy policies, terms and consent records for apps and sites.
Website, policies, support pages, sign-in and cloud sync for your mobile app.
Offline-first cloud sync for your app's data, with sign-in for your users built in.
Our build agent: describe your app in a chat and watch it get built. Coming soon.
More articles
Open-weight models in a small company: when running your own beats the API bill
Four places a language model can run, priced from the providers' own pages in October 2026, and the break-even for a firm of five to fifty people. On cost alone, your own GPU wins much later than most expect. Where it wins sooner: data that can't leave, a steady queue, hardware you already own.
Case study #2: we ran our own app through AppBro, and it found 12 problems before a customer could
AppBro sets up the pages an app needs for store review. Before asking anyone else to trust it, we used it for iPaid iOwe, an app of ours that is already in the stores. Here's what worked in under a minute, the 12 things that broke, and what we still haven't tested.
Privacy policy and sync for your app without a backend
The app is finished and the store form still wants a privacy policy URL, a support URL and a delete-account page, and your users want their data on a second phone. What the stores really ask for, three ways to cover it, an honest table, and how far our two small tools, AppBro and DBSync, take you before you need a real backend.