No moat. Still in business.

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An iPhone app that takes Japanese learners from beginner to fluent with one new sentence per flashcard and spaced review.

Since 2015

Courses and learning · Individuals and families

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Desktop data analysis app where you ask about your data in plain English and get Python code, charts and notebooks run on your computer.

Since 2017

Data and spreadsheets

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Blocks chosen apps on a schedule or timer and scores daily phone habits to help people cut screen time.

Subscription · Focus and productivity · Individuals and families

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Records which apps and websites you use on your computer or phone so you can see where your time goes, stored locally.

Free · Time tracking · Individuals and families

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Keeps chosen iPhone apps locked until you reach a daily step, push-up or workout goal.

Since 2024

Free plan · Health and habits · Individuals and families

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An image CDN that resizes, crops and converts your uploaded images to modern formats through simple URL parameters.

Since 2026

Free plan · Developer tools · Developers

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Parents paste approved YouTube links into a separate shelf for each child, with no search or recommended feed.

Since 2026

Free · Family and parenting · Individuals and families

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Shrinks and converts AVIF, WebP, PNG and JPEG images for faster websites, in the browser, by API or plugin.

Free plan · Design and images

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A note app for desktop and phone that records and transcribes, then answers questions using your own notes.

Since 2026

Notes and knowledge · Individuals and families

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A WordPress plugin that shrinks uploaded JPEG and PNG images and can make WebP copies, for bloggers and editorial teams.

Free plan · Website builders · Creators and writers

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Gets and renews free Let's Encrypt SSL certificates on cPanel shared hosting without command line work.

Free plan · Security and passwords

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Lets developers share live progress of scripts and jobs through a link, via an API or a tqdm replacement.

Uptime and monitoring · Developers

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Make your own flashcard decks and review them on a spaced repetition schedule in the browser.

Since 2015

Free plan · Courses and learning · Individuals and families

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A browser extension that saves and highlights words you look up on web pages, then drills them with flashcards.

Since 2020

Free plan · Courses and learning · Individuals and families

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Note app for students that builds flashcards, quizzes and summaries from notes and PDFs with spaced repetition.

Since 2021

Free plan · Courses and learning · Individuals and families

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A Mac app that blocks social and video sites during the work hours you set, across every browser.

Since 2024

One-off payment · Focus and productivity · Individuals and families

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Helps students sort courses, tasks, class schedules, flashcards and files into colour-coded folders.

Free · Focus and productivity · Individuals and families

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Puts a short pause in front of social media apps and sites so people open them less and cut their screen time.

Focus and productivity · Individuals and families

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Flashcard app that uses spaced repetition so learners review hard cards more often, with sync between devices.

Courses and learning · Individuals and families

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Blocks distracting apps and sites on iPhone, iPad and Mac with schedules, daily limits and synced rules.

Since 2024

Focus and productivity · Individuals and families

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Flashcard app for iPad and iPhone where students draw, type or add images to cards and review them with spaced repetition.

Since 2024

Courses and learning · Individuals and families

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A study app for students with spaced repetition flashcards, made from notes and PDFs, and scheduled around your calendar.

Free plan · Courses and learning · Individuals and families

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Locks your phone, apps or accounts until a set time, then sends the unlock code so you cannot give in early.

Since 2024

Free plan · Focus and productivity · Individuals and families

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Spreadsheet that links to databases and files and lets AI write the formulas, Python and charts for you.

Since 2023

Data and spreadsheets

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Stops you opening distracting apps, sites and keywords on phone and browser, with profiles set by time, place or Wi-Fi.

Free plan · Focus and productivity · Individuals and families

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Adds pauses, daily limits and schedules to distracting apps and websites so people scroll less, paid for by donations.

Free · Focus and productivity · Individuals and families

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Students turn class notes or a PDF into a practice test that marks itself and explains each question they got wrong.

Since 2024

Free plan · Courses and learning · Individuals and families

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Flashcard maker that schedules reviews by spaced repetition, with dictionaries and text to speech for language learners.

Since 2024

Free plan · Courses and learning · Individuals and families

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Learn to read Arabic with alphabet lessons, graded stories and flashcards that schedule reviews around your memory.

Since 2026

Free plan · Courses and learning · Individuals and families

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Locks chosen iPhone apps once your daily limit runs out and makes you wait 67 minutes before a short break.

Focus and productivity · Individuals and families

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Phone app that hides Reels, Shorts and TikTok-style feeds while leaving your DMs, stories and friends' posts alone.

Since 2025

Focus and productivity · Individuals and families

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Android and iOS app that asks you to finish a small task, like a quick sum, before opening apps you spend too much time on.

Since 2026

One-off payment · Focus and productivity · Individuals and families

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Blocks distracting apps and sites until you hit daily goals like steps or work tasks, synced from fitness trackers.

Since 2026

Health and habits · Individuals and families

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iPhone launcher that trims your home screen to the apps you need and puts small tasks in front of the addictive ones.

Focus and productivity · Individuals and families

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A language app that translates words offline, saves them to your own tagged word list and helps you review them with flashcards.

Since 2025

Courses and learning · Individuals and families

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A reading and study app that lets you clip from books and papers, link the clips in mind maps and review them as cards.

Courses and learning · Individuals and families

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Helps you set an iPhone Screen Time passcode you will not remember, held behind a wait timer to curb phone use.

Since 2026

Free plan · Focus and productivity · Individuals and families

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WordPress plugin that turns site images into WebP and AVIF files so pages load faster.

Free plan · Design and images

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A language app where a partner or friend fills in words, audio and sentences for you to study, on iPhone and Android.

Since 2025

Courses and learning · Individuals and families

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A kid-friendly front end for your own Plex library, with PIN-locked settings, rating filters and screen time limits for parents.

Since 2026

One-off payment · Family and parenting · Individuals and families

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iPhone browser for Instagram, YouTube, X, Facebook and Reddit that hides Reels, Shorts and feeds and sets time limits.

Since 2026

Subscription · Health and habits · Individuals and families

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Hover over Chinese text in any Mac app to see pinyin, meanings and sentence breakdowns, and save words as flashcards.

Since 2026

Free plan · Courses and learning · Individuals and families

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Chore app for children 4 to 12 where jobs and routines earn points, screen time or cash, no bank account or card required.

Subscription · Family and parenting · Individuals and families

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Screen time app that rewards time away from your phone with points, streaks and challenges against friends and family.

Health and habits · Individuals and families

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Students upload slides or notes and get practice quizzes and spaced-repetition flashcards made from them.

Since 2025

Free plan · Courses and learning · Individuals and families

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A flashcard app that makes study cards from your PDFs, articles and photos and schedules reviews so you remember them.

Since 2026

Free plan · Courses and learning · Individuals and families

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Learn English words from books you are reading, with ready-made flashcards, quizzes and a word bank.

Since 2025

Free plan · Courses and learning · Individuals and families

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An iPhone browser for Instagram, TikTok, YouTube and others that hides reels and suggested feeds but keeps messages.

Since 2026

Focus and productivity · Individuals and families