Three small learning apps I built for my ten-year-old. They are free, there is nothing to sign up for, and your child's work stays on your device. Take them if they're useful.
One evening she asked me a question about fractions, decimals and percents. Simple enough, I thought — I can explain this in a minute. Five minutes later she was in tears, telling me I thought she was stupid, and I had worked myself into a temper.
She is ten, she is bright, and she would rather play than grind through more practice — which I understand, because I hated worksheets too. I don't want her drilling her way to speed (in Chinese we call it 刷题). I want her to see where the idea in a problem actually sits, and then know how to work it out. Whether she is quick about it really doesn't matter.
So after that evening I stopped pushing. She likes playing — so what if she could play and learn at the same time? I threw together a small app. To my surprise it worked: ten minutes a day, badges to collect, and practice aimed only at the parts she was weak on. Ten days later she had the whole thing. Then I made one for vocabulary, one word a day, so that by high school she will have met thousands of words without ever cramming. Then a third for spelling, after her teacher mentioned she drops letters when she rushes.
She opens them herself now, every day. This week she set her alarm ten minutes earlier — not to get to school early, but because one of the badges is called Early Bird and she wanted it. And she has started asking how I made them, saying she wants to build one of her own. It is the first time I have seen her genuinely curious about something. Teaching her to vibe-code is next, and I can't wait to see what she comes up with.
One word each day — what it means, how to say it, a sentence, and often the quote it came from. Badges, puzzles and a streak that forgives a missed day. Slow on purpose: a word a day for a few years is thousands of words, and never the same word twice.
Open Word a DayThe one that came out of that question. A ten-day course that teaches why ¼ and 0.25 and 25% are the same amount, using pizza and pocket money, with the rules coming last on purpose. Then endless practice, real calculations across all three, and a test on day eleven.
Open Three Ways to Say ItA flip card shows the meaning and a row of empty letter boxes. Type the word, flip the card, see whether you got it. Anything missed lands on a Tricky list with a hint, and comes back until it sticks. It reads the word aloud, the way a real spelling test does.
Open Spell It, Flip ItNo account, no password — the name your child types is how their work is saved. Three things worth doing on the first day:
If a browser gets cleared, or you move to a new phone, just type the same name again — the progress comes back. The PIN is what stops anyone else doing the same. One PIN covers all three apps.
I asked her why she is so keen on these. Her answers, word for word:
It’s like playing a game.
I get to collect different badges every day.
It practises the parts I actually don’t know — it’s not boring like worksheets.
This app is made for ME!
Nothing in them punishes her: no timer, no ads, and missing a day costs nothing. But that is not why she opens them. She opens them because the last one is true: this was made for her alone, around what she likes.
These three work because I knew exactly what my daughter was stuck on. If your child is stuck on something specific — long division, times tables, reading comprehension, characters, verb conjugations — that gap can be closed, and it does not take as much as you think. If you know how to code, this part is the easy part: build one for your own kids, and share it the way I did, so more children get something out of it. If you don't code, or you simply have no time, we can talk it through, and I will either build it for you or show you how to build it yourself.
However is easiest for you — WeChat, WhatsApp or email:
Tell me your child's age and the one thing they are stuck on — that is enough to start. No mailing list, and I never pass anything on.
This is not a product. It is what one mother built for one child, and then shared with a few friends. There is no team, no support desk, no roadmap, no ads. These three apps are free and will stay free.
These apps are not trying to be anyone's curriculum. They are the ten minutes between dinner and bed, aimed at the one thing your child happens to be stuck on.
The apps ask for a first name and nothing else — no email, no account, no login. Work is saved in the browser and synced by that name, so it survives a cleared browser or a new phone.
I can see first names, how often an app was opened, and progress counts. I never see answers, anything typed, or who a child is.
女儿十岁，我给她做了三个学习用的小App。免费，不用注册，孩子练的东西都存在你自己的手机或平板里。你如果觉得有用，就拿去用。
有天晚上她问我一道有关分数、小数和百分比的问题，我想这么简单的事，还不是信手拈来，结果5分钟后，她哭着说我觉得她笨，我也把自己气得够呛。
她十岁，脑子不笨，就是宁可玩也不想多刷题，这我理解，我自己小时候也烦做卷子。我不想让她靠刷题把速度刷上去，我想让她真明白这个题的知识点在哪里，然后知道怎么算出来，至于算得快慢真不是大问题。
所以那天之后我没再逼她，我想她既然喜欢玩，那干脆让她玩着学？就随手给她做了个小App。没想到真管用。每天打卡10分钟、收集徽章、专练她的薄弱点。10天后，概念全懂了！后来又做了个背单词的，一天就一个词，这样等她上高中，几千个词早就见过了，不用临时抱佛脚。再后来做了第三个练拼写的，因为老师说她写快了老掉字母。
现在她每天主动打开app学习。这周闹钟还特意往前调了十分钟，不是为了早上学，是因为徽章里有个 Early Bird（早起鸟），她想要。然后最近她开始问我这些都是怎么做出来的。说她也想自己做一个。这是我第一次看见她发自内心对一件事情感到好奇。下一步可以开始教她vibe coding,看看她自己能搞出什么花样来。
每天就一个词：什么意思、怎么读、一个例句，不少词还配了它最早出现的那句名言。有徽章，有拼字小游戏，连着打卡断一天也不清零。速度慢是故意的：一天一个，几年下来就是几千个词，没有重复。
打开 Word a Day最早就是因为这个题才开始做的。十天的小课，用披萨和零钱把 ¼、0.25、25% 其实是同一个量讲明白，规则特意留到最后才讲。之后想练多久练多久，还有三种形式混着的真运算，第十一天考试。
打开 Three Ways to Say It卡片正面给出词义和一排空格，把单词一个字母一个字母填进去，翻过来看对没对。拼错的会进「易错本」，附带记忆窍门，过一阵再拿出来考，直到记住为止。它还会把单词念出来，跟老师报听写一样。
打开 Spell It, Flip It不用账号，也没有密码。孩子输入的那个名字，就是他的存档。头一天最好把这三件事做了：
浏览器被清空、换了新手机都不要紧，把同一个名字再输一遍，进度就回来了。PIN 就是防着别人也这么干。一个 PIN，三个 App 通用。
我问她：这些App为什么做得这么积极？她的原话是：
跟玩游戏一样
每天都能收集不同的徽章
专门练我不会的地方，不像刷题那么无聊
This app is made for ME!
这些 App 里没有惩罚：不计时，没有广告，漏一天也不影响什么。但她愿意打开，不是因为这些。是因为最后那句话是真的：这是给她一个人做的，根据她的喜好。
这三个之所以好用，是因为我特别清楚我女儿卡在哪儿。如果你家孩子也卡在某个具体的点上，比如长除法、乘法口诀、阅读理解、认字、动词变位，这个坎是能过去的，而且没你想的那么费劲。你要是会写代码，这部分其实是最简单的：给自己孩子做一个，然后像我一样分享出去，让更多孩子也能用上。你要是不会写代码，或者干脆抽不出时间，那我们可以先聊聊，我帮你做，或者教你怎么自己做。
哪个方便用哪个 —— 微信、WhatsApp 或者邮件：
告诉我孩子多大、卡在哪一件事上，就够开始聊了。不进任何邮件列表，也不会转给别人。
这不是一个产品。这是一个妈妈给自己孩子做的东西，后来分享给了几个朋友。没有团队，没有客服，没有广告。这三个 App 免费，以后也免费。
它们不想成为谁的教材。它们就是晚饭到睡觉之间的那十分钟，专门对着你家孩子卡住的那一个点。
App 只要一个名字，别的什么都不要：不要邮箱、不要账号、不用登录。练习记录存在浏览器里，靠这个名字同步，所以浏览器被清空、或者换了新手机，都不会丢。
我这边能看到的只有：名字、打开过几次、还有进度的数字。答案、孩子输进去的任何内容，我都看不到，也不知道这孩子是谁。