Free forever · IELTS & SAT prep in one app

Your IELTS journey,
lit by fireflies.

Endless AI-generated Reading passages, instant Writing band feedback, and calming tools that take the fear out of test prep — so you can focus on what matters: your band score.

AI
Reading passages, endless
0-9
Writing band scoring
0
Test anxiety needed
One app, two exams

More than just practice questions

Firelly runs full, purpose-built prep tracks for both IELTS and SAT — pick your exam in the sidebar and everything below is tailored to it.

IELTS

AI Reading Passages

Endless IELTS Academic Reading passages generated on demand, covering all 9 real question types — Multiple Choice, True/False/Not Given, Yes/No/Not Given, Matching, and more.

AI Writing Band Scoring

Submit any Task 1 or Task 2 response and get an instant band breakdown across all 4 official IELTS criteria, with rewrite suggestions and a Band 9 model answer on demand.

Listening Practice

AI-generated Section 1-4 scripts read aloud once, just like exam day — note completion, table completion, multiple choice, and more.

Speaking Practice

Real Part 1/2/3 format with a live mic — speak your answers, get transcribed instantly, and receive AI band feedback on Fluency, Vocabulary, and Grammar.

Band Score Tracker

Based on your practice data, we estimate your current Reading and Writing bands and tell you exactly what to focus on next.

SAT

Official Question Bank

Practice, Question Bank, Diagnostic, and Mock Test all pull live from the College Board's own public Digital SAT Question Bank — real questions, not AI approximations.

Diagnostic Placement

A short diagnostic test figures out your starting level across Math and Reading & Writing so your first study plan is built on real data, not a guess.

Desmos Calculator & Reference Sheet

The exact graphing calculator and formula reference sheet you get on test day, built into every Math question so you practice exactly how you'll test.

Mock Tests & Super Score

Full-length mock tests scored on the real 200–800 per-section, 400–1600 total scale, with Super Score tracking your best Math + best R&W across every attempt.

Error Log

Every missed question gets logged automatically so you can review your actual mistake patterns instead of re-guessing what you got wrong.

Works for both

Calm Mode

Soft animations, breathing exercises, and encouraging messages — built for anxious test-takers, whichever exam you're facing.

AI Mentor — Mira

Stuck on a strategy question? Chat with Mira, your AI mentor. She knows your practice data for whichever exam you're prepping.

Vocabulary Builder

Spaced-repetition flashcards with mastery tracking — a dedicated word list for each exam's vocabulary demands.

Notes & Logbook

Obsidian-style markdown notes with wiki-links and AI summaries — keep your strategy notes in one place, across both exams.

Progress Protection

Never lose your progress. Everything is saved in your browser, and syncs across devices when you're signed in.

Mental Wellness

Test-anxiety strategies, daily affirmations, and breathing exercises — because your score should reflect your ability, not your nerves.

For anxious test-takers

Test day doesn't have to be scary

Test anxiety is real, whether you're staring down IELTS or the SAT. Firelly is specifically designed to reduce it — so your score reflects your actual ability, not your nerves.

Breathe First

Before every practice session, Firelly offers a 60-second breathing exercise. Science shows this lowers cortisol and improves focus.

Progress, Not Perfection

Every low-scoring attempt is data, not failure. Our system celebrates improvement, not just perfect scores.

Encouragement Built In

Real, thoughtful feedback after every session, whichever exam you're practicing for. We never shame you for a low score.

Know Your Enemy

Standardized tests are a learnable skill, not an IQ test — whether it's the patterns IELTS examiners score against or the trap answers College Board writes into the SAT. We'll show you exactly what to look for.

Ready to light your path?

Join test-takers using Firelly to reach their target IELTS band or SAT score. AI-powered, built for focus, designed for calm.