Kolibri

Almost every education app on your phone quietly assumes you’re online. Streamed lectures, progress saved to the cloud and adaptive engines that phone home all depend on a working connection. Kolibri starts from the opposite assumption: the internet is missing, unreliable or too expensive, and the lesson still has to happen.

Kolibri comes from Learning Equality, a US 501(c)(3) nonprofit that has worked on offline education since its earlier KA Lite project, which packaged Khan Academy for schools without internet. Kolibri goes much further. It’s a complete learning management system with five parts: a content library, a learner app, teacher tools, a curriculum builder called Kolibri Studio, and a data portal for program managers who oversee many schools. It’s free, it’s released under the MIT license, and it’s still in active development. Version 0.19.5 shipped in July 2026.

Its place in the market is unusual. Kolibri isn’t trying to win a parent’s Sunday afternoon away from Duolingo or Khan Academy’s polished consumer apps. Its real audience is education nonprofits, government programs and rural school networks. These groups need to put a full K-12 curriculum on a Raspberry Pi or a stack of cheap tablets and have it keep working without a connection. Learning Equality says Kolibri is used in more than 220 countries and territories, and HundrED and MIT Solve have both featured it.

That context explains the Android app. On Google Play it has 10K+ downloads and no public star rating, a tiny footprint for a platform with that kind of reach. The reason is that Android is one piece of a system built mainly for laptops, desktops and low-cost servers. As a standalone consumer app, it’s competent and not much more. As a way to run Kolibri on the hardware schools can actually afford, it matters a great deal.

• Full offline use: Once channels are downloaded, lessons, exercises, books, games and simulations all run with no connection. This isn’t a temporary cache with a license timer. Working offline is the normal state.
• Kolibri Content Library: A catalog of openly licensed channels in dozens of languages. It covers math, science, reading, health, coding and life skills, with formal lessons and assessments alongside less formal material.
• Sharing over a local network: Devices on the same local network can copy content from each other, including from computers running Kolibri, without internet. One download can supply a whole school.
• Teacher dashboard: Teachers can see each learner’s progress, build lessons and quizzes, and assign homework that syncs when a device reconnects.
• Instant feedback: Quizzes and exercises are marked right away, so students learn from a mistake while it’s still fresh.
• Kolibri Studio and the data portal: Educators can combine and rearrange content into custom curricula, and program managers can track many schools in one place.
• Wide platform support: Android, Windows, macOS, Linux and Raspberry Pi, all under one open-source license.

Taking the offline premise seriously

Most apps treat “offline mode” as an extra: you download a few items and hope the license check doesn’t expire. Kolibri treats a connection as the extra. Content, progress tracking, quizzes and teacher tools are all built to work without internet, and that shapes the whole design. Syncing happens whenever it can; nothing depends on it.

Sharing over the local network is the smartest idea in the system. A school might have one decent connection, or none at all and a hard drive delivered by car. Either way, it loads content onto one machine, and every other device on the local network copies from it. That turns a bandwidth problem into a delivery problem, and delivery problems can be solved. For a district that pays by the megabyte, this can decide whether a pilot grows into a real rollout.

How learners use it

Getting started on Android is plain by design. The app opens on the Channels tab, where someone picks what to download from the Kolibri Content Library. A consumer app would never accept this much setup, because you’re choosing a curriculum rather than tapping “Start learning.” It suits the real audience, though. A teacher or facilitator usually sets up the device before a student ever touches it.

Once content is on the device, the routine is simple: open a resource, try an exercise, get instant feedback, and move on. The mix of material, with lessons and assessments next to books, games and simulations, keeps it from feeling like a worksheet machine. Don’t expect Duolingo-style streaks, leaderboards or pushy reminders. Kolibri motivates students the way a good classroom does, through the material and the teacher rather than notifications. Some people will see that as a weakness; many will see it as a relief.

The weak spot is consistency. A library built from many openly licensed sources in dozens of languages won’t feel uniform. Production quality, pacing and tone change from channel to channel, and depth probably varies by language. That’s the cost of open licensing at this scale. Kolibri Studio exists partly so educators can fill those gaps and assemble something coherent.

The teacher’s view

The teacher tools are where Kolibri does more than most free options. Teachers can check each learner’s progress, build lessons and quizzes from downloaded content, and assign homework that syncs when the device reconnects. That last feature is easy to overlook and very useful. A student can take a tablet home, work offline, and the results reach the teacher later without anyone emailing files or collecting paper.

On a phone, though, the dashboard is built for bigger screens. Tables of learners and quiz breakdowns are much easier to read on a tablet or laptop, and the interface seems designed with that in mind. Teachers will likely set up classes on a larger screen and hand the Android devices to students.

Studio and the data portal

Kolibri Studio lets educators build custom curricula by reordering and combining content to match a local syllabus. The data portal lets program managers follow many schools at once. Neither is an Android feature, but together they explain why an organization would commit to Kolibri instead of loading tablets with loose PDFs and videos. The same platform works for one classroom or a national program.

Evidence and caveats

Learning Equality reports better literacy and numeracy, higher math and physics pass rates, and fewer dropouts where Kolibri is used. Those are the developer’s own numbers, so treat them with the usual skepticism. Still, they match what the design should produce: reliable access to structured content plus teachers who can see how students are doing. What’s missing is feedback from ordinary users. With no public Play Store rating, a parent judging the app alone has very little to go on.

Kolibri’s interface is practical and restrained: content cards, clear labels and very little decoration. The Android app shows the same web-based interface Kolibri uses on every other platform. That helps teachers, because anyone trained on a laptop will know their way around a tablet. The downside is that it isn’t built as a native Android app. Navigation and transitions follow web conventions rather than mobile ones, and the screens look functional rather than inviting.

The offline-first design removes the usual bottlenecks. Once content is stored on the device, lessons and videos play from local storage, so there’s nothing to stream and nothing to buffer. The real limit is storage. Channels with lots of video can take up a lot of space, and budget phones with little storage call for careful channel choices. Kolibri is built for modest hardware (it supports the Raspberry Pi), but a full learning platform on a phone asks more of the device than a flashcard app. Any organization buying devices should check the storage demands of its chosen channels against the models it plans to use.

On Android, Kolibri works best on a tablet. Touch is a good fit for the student side: tapping answers, scrolling through a lesson and opening a book or simulation are all simple interactions. Phones are fine for learning but cramped for the teacher dashboard, which is much more comfortable on a large screen or a laptop with mouse and keyboard.

The more important point is how Android fits into the larger system. Cheap Android devices can copy content from a school’s Kolibri computer over the local network, so one server can supply a room full of tablets. Homework that syncs on reconnect suits devices that go home with students and come back days later.

The biggest gap is that there’s no iOS version. A school that uses iPads can run Kolibri on Macs but not on its Apple tablets. The Play Store’s 10K+ downloads also understate how widely Kolibri is used, since most of the system runs on laptops, desktops and Raspberry Pi hardware.

Kolibri isn’t the slickest learning app on Android, and it doesn’t try to be. It’s a serious answer to a problem most edtech ignores: how to give a child a real curriculum when there’s no internet. The offline design is thorough, sharing over a local network is clever, and the teacher tools do things free alternatives usually don’t. The Android app has real limits. It behaves like a website, the teacher dashboard is cramped on phones, and a student learning alone has to do some setup first. Those are small problems next to what the platform does well, but they keep it from being an easy recommendation for everyone. Parents looking for a flashy tutor app should look elsewhere. For a school or nonprofit that has to teach without a connection, Kolibri is a free tool that’s hard to replace.