Notes on building.
Guides on mobile apps, web platforms and AI products. Cost breakdowns, stack comparisons and how we ship.
Apple Multiseat Subscriptions Are On by Default: Check Yours
Since October 22, 2026, businesses and schools can buy your app subscription in bulk through Apple Business and Apple School Manager unless you opted out. Here is what that means for your pricing, your support load and your revenue reports.
Cost & planning · Oct 26, 2026 · 10 min read
WhatsApp Service Messages Now Cost Money: Rebudget
Since October 1, 2026, Meta bills service messages past the first 1,000 a month per phone number, and utility messages inside the 24-hour window are billable too. Here is how to find your exposure and cut it.
Cost & planning · Oct 25, 2026 · 10 min read
What It Costs to Take Over an Abandoned App Codebase
Your agency went quiet, your freelancer moved on, or your CTO left with the passwords. Here is what a takeover costs, what to secure in week one, and when to stop patching and rebuild.
Cost & planning · Oct 22, 2026 · 11 min read
Gemini 4 Argon Pricing Doubles December 1: Budget for It
Google's introductory rate for Gemini 4 Argon ends soon, and the list price doubles after it. Here is how to model your unit cost at the post-December price, cap the downside and decide whether to stay.
Cost & planning · Oct 20, 2026 · 10 min read
Claude Haiku 5.5 at $0.10 Per Million: Where It Fits
Anthropic released Claude Haiku 5.5 on October 7, 2026 at $0.10 per million input tokens and $0.50 per million output tokens. Here is the real cost math, the jobs it fits, and the pricing traps that change your bill.
Cost & planning · Oct 18, 2026 · 9 min read
Google Play's US Billing Rules: Reporting Deadlines for Founders
Google has set reporting and fee dates for US developers using alternative billing or external content links. Here is what the dates mean for your app, your payments stack and your margin math.
Cost & planning · Oct 16, 2026 · 11 min read
What Your App Costs to Run Per Month at 1K, 10K and 100K Users
Your app costs very little to run at launch and then climbs in steps, not a line. Here is what goes in the bill at 1K, 10K and 100K users, and where the surprises come from.
Cost & planning · Oct 15, 2026 · 10 min read
Who Owns Your App's Code? What to Get in Writing
Paying an agency does not automatically make you the owner of the code. Here is what to get in writing about IP assignment, repos, cloud accounts and handover before you send the first invoice.
Cost & planning · Oct 10, 2026 · 12 min read
How Much Does It Cost to Build a Micro-Frontend Architecture?
Micro frontends promise independent deployability and team autonomy, but they come with real costs that most teams underestimate. Here is what you will actually spend depending on your approach, team size, and existing codebase.
Cost & planning · Sep 13, 2026 · 14 min read
How Much Does It Cost to Build an AI Scheduling Assistant 2026?
Building an AI scheduling assistant can cost anywhere from $25K for a basic MVP to over $200K for an enterprise platform. Here is what actually drives the price and where most teams overspend.
Cost & planning · Sep 11, 2026 · 14 min read
How Much Does a Subscription Analytics Platform Cost to Build?
Building a subscription analytics platform from scratch costs anywhere from $40K to $400K depending on what you actually need. Here is how to figure out which number applies to you.
Cost & planning · Sep 10, 2026 · 14 min read
How Much Does It Cost to Build a Data Platform for Startups?
Most startups either overspend on a data platform they do not need yet, or cobble together spreadsheets until the cracks become catastrophic. Here is what it actually costs to build a data platform at each stage of growth.
Cost & planning · Sep 9, 2026 · 14 min read