A personal app does exactly one job for exactly one person — you. It has no sign-up, no ads, no settings you will never touch. AI assistants made these cheap enough to build for a single trip or a single month, and then throw away.
Think about the apps on your phone. Almost all of them were built for a very large number of people. That is not a criticism — it is just what it takes to justify a team, a roadmap, and a business. But it has consequences you feel every day:
- An onboarding flow, because the app cannot assume anything about you.
- Settings for cases that are not yours.
- Ads or a subscription, because the app has to pay for itself across everyone.
- Features you scroll past, because someone else asked for them.
A personal app drops all of that. It is built for one person, so it can assume everything. It does one job. When the job is done, you delete it.
Examples
The useful ones are almost embarrassingly specific:
- A day-by-day planner for one trip — your five days in Lisbon, with the stops you actually care about and a checkbox for each.
- A tracker for one goal — the next six months of a training plan, nothing before or after.
- A budget for one month in one city, in the currency you are spending.
- A packing list for one kind of trip — winter, carry-on only, grouped by bag.
None of these would survive as a product. All of them are worth ten minutes to build for yourself.
What changed
Two things had to be true for this to make sense.
Building had to get cheap. Describing an app to Claude, ChatGPT or Gemini and getting back a working single-file version takes a minute. If it is not quite right, you say what is wrong and get a new version. The cost of a personal app fell to roughly the cost of a text message.
Running it had to get easy. A file full of HTML is not an app you can use on a phone. That is the gap CanvasRunner fills: it runs the file locally, in a sandbox, offline, and lets you pin it to your home screen so it behaves like anything else you have installed.
The disposable part matters
Because a personal app is cheap to make and yours alone, you are free to throw it away. The trip ends, you delete the planner. The goal is met, the tracker goes. Nothing is tracking whether you churned. Nothing emails you to come back.
That is the whole point. Software you make for yourself does not need to keep you.
Practical next step: turn a Claude Artifact into an app on your phone.