# Flask

> Free browser to-do lists shared by URL, with no sign-up

Flask, styled Flask Lists on its site, is a free to-do list app that runs in the browser. A list can be created and filled in without an account, and it is shared by copying its URL, with no invitations or permission settings. Signing up is only needed to save more than one list. The site lists no paid plan and takes donations through a Buy Me a Coffee link.

- **Category:** To-Do List Apps
- **Made by:** NewVariable Digital Solutions Private Limited (since 2013)
- **Website:** https://flask.io
- **Runs on:** Web
- **Facts last checked:** Oct 9, 2026

## Pricing

Flask is free to use.

- **Pricing model:** Free
- **Free plan:** The whole app is free. A list can be made without an account; a free sign-up is only needed to save more than one list.
- **Free trial:** None listed.

| Plan | Price | What you get |
| --- | --- | --- |
| Free | $0 | Every feature of the web app. The site lists no paid plan and has a Buy Me a Coffee link for donations. |

Read from https://flask.io/ on Oct 9, 2026. Prices change, so confirm with Flask before buying.

## Key features

- **No sign-up to start:** A new list opens straight from the homepage and tasks can be added at once. An account is only needed to save and manage more than one list.
- **Sharing by URL:** Each list has its own address, and copying that address is the whole sharing step. There are no permissions and no formal invites.
- **Task basics:** Tasks can be added, edited, reordered, checked off and deleted, starred, and tagged with colors.
- **Email and embed:** The changelog on the About page lists emailing a list and embedding a list among the features added in 2013.
- **Any device with a browser:** The app is browser based with a responsive design for phones, so there is nothing to install and lists are the same on every device.
- **API on request:** The About page offers developers access to an API by email, for uses such as adding to-do lists to another product.

## Good for

- A quick shared list with no accounts or setup
- Shopping, packing and wish lists passed around as a link
- People who want a to-do list with very few features

## Worth knowing

- Sharing has no permission settings: a list is shared by its URL, with no invites.
- It is browser only. The About page asks developers who want to help build a mobile app to get in touch, and no native apps are offered.
- The terms of use mention a paid PRO account, but the /pro page they point to returns a not-found page and the site lists no paid plan.
- API access is given on request by email; the site has no public API documentation.

**Tags:** Tasks, Public API

## Alternatives

- [Checkli](https://toolgpa.com/tools/checkli): Web checklist maker for recurring processes and shared runs. [Compare](https://toolgpa.com/compare/checkli-vs-flask)
- [WeDo](https://toolgpa.com/tools/wedo): Shared to-do lists for families, couples and small teams. [Compare](https://toolgpa.com/compare/flask-vs-wedo)
- [Microsoft To Do](https://toolgpa.com/tools/microsoft-to-do): Free to-do list from Microsoft that syncs with Outlook tasks. [Compare](https://toolgpa.com/compare/flask-vs-microsoft-to-do)
- [Google Tasks](https://toolgpa.com/tools/google-tasks): Google's to-do list, built into Gmail, Calendar, Chat and Docs. [Compare](https://toolgpa.com/compare/flask-vs-google-tasks)

## Sources

The prices, plans, platforms and features above were read from these pages on Oct 9, 2026:

- https://flask.io/
- https://flask.io/about
- https://flask.io/terms

Page: https://toolgpa.com/tools/flask
Listed by ToolGPA (toolgpa.com).