Seneca Learning and Heddy do different jobs: Seneca is a free, content-led revision platform you work through, while Heddy is a set of AI tutors you turn to when you are stuck and that refuse to give you the answer. For many KS3 families the honest answer is that Seneca is the better first stop for content, and Heddy is the better second stop for the moment a question will not click.
Seneca is content you work through. Heddy is help when you are stuck.
What Seneca is, in its own words
Seneca is a UK learning platform made up of courses, quizzes and revision tools. Its help pages say a free tier includes over 600 free exam-board-specific courses, and that the platform is currently only available in the UK. Its pages describe courses for ages 8 to 18, from KS2 through KS3, GCSE and A level, and its homepage offers KS3 as a level with a subject list (not split by level) that includes English, maths, the sciences, history, geography, French and Spanish.
On top of the free tier sit paid Premium packages. At the time of writing, in September 2026, Seneca's help pages describe three packages that can be paid monthly, seasonally or annually, with the prices shown when you choose a package. Seneca's own descriptions of what Premium adds include a Smart Learning mode that recommends what to study next, a Wrong Answers mode that returns you to the questions you missed, quiz mode and AI-marked exam-style questions (from its Exam Boost package up), and an AI chatbot called Amelia.
What Seneca does better
Price and breadth. A free tier that covers that much of the curriculum is a real public good, and Heddy cannot match its scale. Heddy teaches seven subjects and is deliberately narrower.
It is a whole course, not a conversation. Seneca sequences content, tests it and tracks it. If your child needs the material laid out and then checked, that structure is valuable, and a chat-style tutor does not replace it.
It serves schools as well as families. Seneca has a teacher platform and a schools offering. Heddy is a consumer app with no classroom tooling.
Exam-style marking in the paid tiers. Seneca describes AI-marked exam questions written with examiners and teachers. Heddy's tutors teach the method behind an answer, but the app is not a question bank you sit papers in.
Where Heddy is different
It is built for the moment of being stuck. A course tells you the content. A tutor asks what you tried. Each Heddy professor walks a four-rung hint ladder: a nudge, a bigger nudge, a method, and finally a fully worked similar problem followed by "now redo yours". There is no rung that reveals the answer to the problem in front of you, and that is deliberate.
The AI is designed to withhold. Seneca describes Amelia as an AI-powered chatbot giving instant answers and clarifications for a student's year group. That is a legitimate and useful design, and it is a different one. Heddy's whole premise is that being handed a finished answer teaches you very little.
A separate professor per subject. Heddy has a guide plus seven subject professors, each using a method suited to their subject, so the physics tutor asks you to predict before you observe and the English tutor will not write your paragraph. Seneca is one platform with one approach to every subject.
Flashcards that come from your own mistakes. Heddy's sessions become flashcards, written from what you actually got wrong. Seneca's own revision tools are built on the course content rather than your conversations.
No account to start. Heddy opens straight into the app on iPhone without an email or password, and it is aimed at students aged 13 and over in the UK.
A side-by-side, with dates
| Seneca Learning | Heddy | |
|---|---|---|
| Core idea | Courses, quizzes, revision tools | AI tutors plus flashcards |
| Free to start | Yes, a free tier | Yes, free to start |
| Paid options | Three Premium packages | Tutor turns are metered; flashcards are free |
| Responds to "I'm stuck" | Content, plus an AI chatbot (Amelia) | A hint ladder that never gives the answer |
| Subjects at KS3 | Several, including languages | Seven subjects |
| Availability | Online, UK only (currently) | iPhone app, UK, 13+ |
All Seneca details are from its own help pages as read in September 2026, and Seneca changes its packages, so confirm on its site.
Which to choose
Choose Seneca if your child needs content laid out and tested, you want a large free library, you need languages, or a school already sets Seneca homework.
Choose Heddy if the problem is not missing content but getting unstuck, you want a tutor that makes your child do the thinking, or you want revision cards built from what they actually struggled with. Many families will reasonably use Seneca for the course and Heddy for the tricky question. Heddy is on the App Store if you want to try it.
Comparison written 30 Sep 2026 from Seneca's public help pages. Check Seneca's own site for current packages and prices. Written by Duke Harewood, who builds the tutors at aitutors.me.
Seneca if
- Content must be laid out and tested
- You want a big free library
- You need languages
- School sets Seneca homework
Heddy if
- The problem is getting unstuck
- You want the child to do the thinking
- You want cards from their mistakes
Questions people ask
Is Seneca Learning free?
Seneca says it has a free tier covering many courses, with optional Premium packages on top. At the time of writing (September 2026) its help pages describe three paid packages billed monthly, seasonally or annually. Check Seneca's own pricing page for current figures.
Is Heddy a replacement for Seneca?
Not really, because they do different jobs. Seneca is a course-and-quiz platform you work through. Heddy is a set of tutors you ask when you are stuck, plus flashcards made from those conversations. Some families use both.
Does Seneca's AI assistant give answers?
Seneca describes its assistant, Amelia, as giving instant answers and clarifications tailored to the student's year group. Heddy's tutors are built the other way round: they never give the final answer to the problem in front of you.
Which is better for KS3?
Seneca has KS3 courses across several subjects and a free tier, which is hard to beat for content-led revision. Heddy is aimed at KS3 and early GCSE students who get stuck on homework and need to be walked through it.