The Flask Insider’s Guide
Everything we know about Flask in one document: what it costs, its grades, getting a refund, getting help and what else to look at. Read it here, or keep a copy.
Flask
The Insider’s Guide
Free browser to-do lists shared by URL, with no sign-up
Every plan, grade, refund rule and rival among to-do list apps, read from Flask’s own pages.
Made by NewVariable Digital Solutions Private Limited · checked Oct 9, 2026 · toolgpa.com
Contents
- 01WelcomeWhat it is, who it suits, its grades and the ten things to know first
- 02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
- 03What it doesIts main features, where it runs, what it works with and who makes it
- 04Where it standsIts grades against its category, and whether to keep it or make your own
- 05The alternativesThe tools it is most often weighed against, side by side
- 06Quick answersThe questions people ask about it, each answered in a line or two
- 07About ToolGPAWho made this guide, what else is on the site, and how to cite it
ToolGPA put this guide together from Flask’s own pages, its app-store listings and our grades. Every fact in it is on Flask’s page too, where it is kept up to date. Checked Oct 9, 2026.
Part 01 · Overview
Welcome
What it is, who it suits, its grades and the ten things to know first
2.6
GPA, above 48 of the 123 other to-do list apps we grade
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.
To get you started, here are 8 things to know about Flask, taken from its own pages and our grades.
Tasks get stars and colour tags and that's it, with no due dates, reminders or repeats.
- 1
Best for a quick shared list with no sign-up
Flask is a free web to-do list: open the site, type, and share the list by copying its address, with no account needed for the first list.
- 2
It is free
Flask has no paid plan at all. 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.
- 3
It runs on Web
Web.
- 4
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.
- 5
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.
- 6
Task basics
Tasks can be added, edited, reordered, checked off and deleted, starred, and tagged with colors.
- 7
A 2.6 GPA, above 48 of 123
That is against the other to-do list apps we grade, on value, the free plan, features, ease of use and platforms.
- 8
Keep it
Flask is free, so making your own would save you nothing.
Flask at a glance
- Pricing
- Free
- Free plan
- Yes
- Free trial
- None stated
- Runs on
- Web
- Made by
- NewVariable Digital Solutions Private Limited, since 2013
- Category
- To-Do List Apps
- Our grade
- 2.6 GPA, good
The report card
Best for a quick shared list with no sign-up
Flask is a free web to-do list: open the site, type, and share the list by copying its address, with no account needed for the first list. Tasks get stars and colour tags and that's it, with no due dates, reminders or repeats. Sharing has no permission settings, there are no phone apps, and the terms mention a paid PRO account whose page doesn't exist.
| Subject | Grade | Comment |
|---|---|---|
| Value for money | B | Free, all of it, with just a Buy Me a Coffee link. You're not paying, but you're not getting much either, and the terms still mention a paid PRO account whose page returns a not-found. |
| Free plan and trial | A | Free outright, every feature, and you don't even need an account for your first list. Signing up is also free and only matters if you want to save more than one. |
| Features | D | Add, edit, reorder, star, colour-tag and tick off tasks, then share, email or embed the list. That's the whole app. No due dates, no reminders and no repeating tasks anywhere on its pages. |
| Ease of use | B | No rating on record, but a new list opens straight from the home page and you type. No account, no install, no settings. |
| Platforms and integrations | C | Web only, with a layout that adapts to phones. No native apps, no integrations on record, and API access is handed out by email with no public documentation. |
An A is worth 4 points, a B 3, a C 2, a D 1 and an F nothing. The GPA is the average of the five.
Who Flask is for
- Fits if you need a shared shopping or packing list with no sign-up
- Works for sharing with people who won't make an account
Who it is not for
- Skip it if you need to control who sees or edits a list, as sharing is just the link with no permissions
- Not for you if you want an app on your phone, since it's browser only
- Too light for real projects, as there are no due dates, reminders or repeating tasks
- Watch out: the terms mention a paid PRO account, but its page returns not-found and the site lists no paid plan
- Watch out: API access is handed out by email, with no public documentation
Good to know
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.
Part 02 · Pricing
What it costs
Every plan, the free plan, ways to pay less and how prices have moved
Free
No paid plan at all
Flask is free to use.
Free, all of it, with just a Buy Me a Coffee link.
Free
$0
Every feature of the web app. The site lists no paid plan and has a Buy Me a Coffee link for donations.
The 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.
Read from flask.io on Oct 9, 2026.
Part 03 · Features
What it does
Its main features, where it runs, what it works with and who makes it
1
Place it runs: Web
Free browser to-do lists shared by URL, with no sign-up. Here is what it does, as its own site describes it, and what it covers: public API, tasks.
Add, edit, reorder, star, colour-tag and tick off tasks, then share, email or embed the list.
- 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.
Where it runs
- Web
What it works with
Its own pages name no integrations.
Flask is made by NewVariable Digital Solutions Private Limited, and has been around since 2013.
Part 04 · Standing
Where it stands
Its grades against its category, and whether to keep it or make your own
48/123
Other to-do list apps it is graded above
Flask's GPA of 2.6 is higher than 48 of the 123 other to-do list apps we grade, and level with 43.
It stands best on free plan and trial (A, above 87 of 123) and worst on features (D, above 0).
Flask has no paid plan.
On features, ease of use and platforms it scores 2.0 out of 4. Nothing scores higher for less, though at least one tool matches that score at a lower price.
Each grade against the category
Every bar is all 124 to-do list apps we grade, cut by the letter each got. Flask’s own letter is outlined.
- BValue for moneyAbove 50 of 123
- AFree plan and trialAbove 87 of 123
- DFeaturesAbove 0 of 123
- BEase of useAbove 56 of 123
- CPlatforms and integrationsAbove 19 of 123
Price against what you get
Each dot is one of 99 to-do list apps. Further left costs less; higher up scores better on features, ease of use and platforms. Flask is the marked dot.
What paid plans start at, a month (each step along is roughly double) →
Keep it, or make your own?
Whether this is something you could build for yourself with an AI app builder, and what you would give up.
Keep it
Flask is free, so making your own would save you nothing.
What you could make
- Tasks: an app builder makes this well.
What you could not
- An API that other software can build on.
- What a company asks for before it lets staff use something: roles and permissions.
What this rests on. Flask’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
Part 05 · Alternatives
The alternatives
The tools it is most often weighed against, side by side
Checkli, WeDo, Microsoft To Do and Google Tasks
The 4 tools Flask is most often weighed against, with where each one differs from it.
- 1.8GPA
Checkli
Free plan · from $29/mo
Web checklist maker for recurring processes and shared runs.
- Checkli also covers templates.
- 2.2GPA
WeDo
Free plan · from $5.99/mo
Shared to-do lists for families, couples and small teams.
- Only WeDo lists iOS and Android apps.
- 3.6GPA
Microsoft To Do
Free
Free to-do list from Microsoft that syncs with Outlook tasks.
- Only Microsoft To Do lists Windows, macOS, iOS and Android apps.
- 3.4GPA
Google Tasks
Free plan · from $7/mo
Google's to-do list, built into Gmail, Calendar, Chat and Docs.
- Only Google Tasks lists iOS and Android apps.
- Google Tasks also covers time blocking and calendar.
Part 06 · Questions
Quick answers
The questions people ask about it, each answered in a line or two
12
Questions, each answered in a line or two
The short version of everything above, for when you only need the answer. Each one is told in full in its part of the guide.
Is Flask free?
Yes. Flask is free to use.
How much does Flask cost?
Flask lists one plan. Free: $0.
What platforms does Flask work on?
Flask is available on Web.
Does Flask have an Android app?
No Android app was listed when its pages were read on Oct 9, 2026. Flask is listed for Web.
Does Flask have an iPhone app?
No iPhone app was listed when its pages were read on Oct 9, 2026. Flask is listed for Web.
Is Flask open source?
Flask is not described as open source on its own site, as read on Oct 9, 2026.
Does Flask have an API?
Yes. Flask offers a public API, according to its own site.
Who makes Flask?
Flask is made by NewVariable Digital Solutions Private Limited. It dates from 2013.
What are the alternatives to Flask?
The closest alternatives to Flask in our directory are Checkli, WeDo, Microsoft To Do and Google Tasks.
How does Flask compare with other to-do list apps?
Flask's GPA of 2.6 is higher than 48 of the 123 other to-do list apps we grade, and level with 43.
Is Flask good value for money?
ToolGPA grades Flask B for value for money. Flask has no paid plan.
Could I make my own version of Flask?
Flask is free, so making your own would save you nothing. What you could not make: An API that other software can build on.
Where this guide comes from
The prices, plans, platforms and features were read from Flask’s own pages on Oct 9, 2026, and the grades were given on Oct 10, 2026. Graded from this listing, whose facts were read from Flask's own pages on 9 October 2026. Also tested with a demo account on 2026-03-08.
Every tool we list gets five grades, A to F, each with its reason, and a GPA that averages them. How each is decided is at toolgpa.com/grades. This guide is ToolGPA’s own work; it is not made, paid for or approved by NewVariable Digital Solutions Private Limited. Prices change, so check flask.io before you buy.
Part 07 · About
About ToolGPA
Who made this guide, what else is on the site, and how to cite it
3,189
Tools graded, in 94 categories
ToolGPA grades software the way a school report grades a pupil: five subjects, a letter for each with the reason written beside it, and a GPA that averages them. Prices, plans and platforms are read from each maker’s own pages and dated, so you always know how fresh a figure is.
Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Every tool on the site has a guide like this one, free to download and pass on. It all lives at toolgpa.com.
3,189
tools graded
94
categories
426
price changes on record
579
apps priced in 12 countries
What else is on toolgpa.com
- Flask, kept up to dateEverything in this guide, with prices and grades as they are todaytoolgpa.com/tools/flask
- How grades are givenThe rules behind every letter and every GPAtoolgpa.com/grades
- Value chartsWhat each tool costs against what it scores, for every categorytoolgpa.com/charts
- CompareAny two tools side by side, plan by plantoolgpa.com/compare
- Price changesEvery price rise and cut on record, each with its sourcetoolgpa.com/price-changes
- Prices by countryWhat apps cost on the App Store in 12 countriestoolgpa.com/prices-by-country
- Pay lessEvery public discount: yearly billing, students, nonprofitstoolgpa.com/save
- Keep or makeWhich tools are worth paying for, and which you could build yourselftoolgpa.com/keep-or-make
Scan for the live page
Prices and grades as they are today
Quoting this guide?
Please name ToolGPA and link to the live page, so readers can check the figures for themselves:
ToolGPA, "Flask: The Insider's Guide", checked Oct 9, 2026. https://toolgpa.com/tools/flask
Know someone choosing between to-do list apps?
Send them this guide: toolgpa.com/tools/flask/guide
ToolGPA elsewhere: youtube.com/@toolgpa
See our other guides
The best-graded to-do list apps after Flask, each with an Insider's Guide of its own.
- To-Do List Apps Insider's GuideEvery one of the 124 to-do list apps we grade, compared
- Apple Reminders Insider's GuideApple's free to-do app for iPhone, iPad, Mac and Apple Watch3.6 GPA
- Microsoft To Do Insider's GuideFree to-do list from Microsoft that syncs with Outlook tasks3.6 GPA
- Google Tasks Insider's GuideGoogle's to-do list, built into Gmail, Calendar, Chat and Docs3.4 GPA
Choosing software? Every tool graded, every price dated.
Compare tools at toolgpa.com ›Everything in this guide is ToolGPA’s own summary of what Flask’s pages, its app-store listings and public reviews said on the dates shown. Grades are our judgement under the rules at toolgpa.com/grades. Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Flask is a trademark of its owner, and this guide is not made, paid for or approved by NewVariable Digital Solutions Private Limited. Prices and plans change: check flask.io before you buy.