Ladderbug Start free
5 min read · October 5, 2026

Kids learning apps that actually work offline

Car journeys, planes, waiting rooms, rural internet, and the family tablet that is only online in the kitchen. Offline is one of the most requested features in children's learning software and one of the least reliably delivered — including, by several accounts, to people who have already paid.

Why so little of it works offline

Three reasons, and they are all structural rather than lazy:

  • Video. A product built on video has to download it. A twenty-minute lesson library is hundreds of megabytes, so most apps stream instead.
  • Recorded audio. Narration for every screen is large for the same reason.
  • Server-side progress. If the child's place is stored on a server, the app wants a connection to know what to show next.

So an app that leans on video, recorded narration and an account will tend not to work offline, and that is usually a consequence of how it was built rather than a decision someone made.

What "offline" actually has to mean

Before you trust a claim, check all four:

  1. Lessons play with no connection — not just a cached menu that then fails.
  2. Progress is saved locally and merges when you come back online, instead of being lost.
  3. No login wall on launch. Plenty of apps work offline except that they check your subscription at startup, which is the same thing as not working offline.
  4. It survives the device clearing its cache. A website that is only bookmarked will eventually be evicted. On an iPad it must be added to the home screen.

How to test it in two minutes, before you pay

  1. Open the app and use it normally for a few minutes so anything that caches, caches.
  2. Turn on airplane mode.
  3. Force-close the app and reopen it.
  4. Try to start a new activity — not resume the one on screen.
  5. Complete it, then go back online and check the progress is still there.

Step 3 is the one that catches most products. Plenty of apps keep working until they are restarted.

The iPad detail almost everyone misses

If you are using a website rather than an App Store app, Safari will eventually delete its stored data if you have only bookmarked the page. Use Share → Add to Home Screen. That turns it into an installed app, and iOS stops evicting its storage. Without that step, offline works until one day it does not.

What we did about it

Ladderbug has no video and no recorded audio files. The voice is your device's own speech synthesis and the sound effects are generated as they play, so there are no media files to download at all. Everything a child needs is text, vector drawings and a few pixel sprites — the whole site is smaller than a single photograph.

That means after one visit the entire thing works with no connection: every lesson, the sound wall, the games, the progress. Progress is stored on the device and never requires an account. Add it to the home screen and it behaves like an installed app.

The honest limit: the voice depends on your device having a speech voice installed, which every modern iPad and Android tablet does, but quality varies by device. Some older tablets have a noticeably flatter voice than new ones. Settings has instructions for installing a better free voice on iOS and Windows.

Try it, then turn off your wifi

Written by the Ladderbug team. We build a free reading and math site for ages 4 to 11, so we have an interest here — where that interest might bend an answer, we have tried to say so on the page rather than hide it.

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