# Codestria IELTS

> Codestria IELTS is a free, browser-based Computer-Delivered IELTS (CD-IELTS) simulator
> engineered by Codestria. It recreates the official test room with dual-pane Reading,
> synchronised Listening audio, three-colour highlighters, a notes scratchpad, official
> timers and question navigation. Reading and Listening are marked instantly from correct
> answers; Writing and Speaking are assessed by an AI examiner using the candidate's own
> OpenAI, Groq or Anthropic API key.

- Canonical site: https://ielts.codestria.com
- Language: English (en-GB)
- Publisher: Codestria — https://codestria.com
- Pricing: free (AI feedback uses the candidate's own provider key)
- Sitemap: https://ielts.codestria.com/sitemap.xml
- Robots: https://ielts.codestria.com/robots.txt

## Core pages

- [Home](https://ielts.codestria.com/): overview of the simulator, exam tools and FAQ.
- [Cambridge test library](https://ielts.codestria.com/tests): full-length Academic and General Training papers.
- [Band score calculator](https://ielts.codestria.com/calculator): raw marks to band conversion and official .25/.75 rounding.
- [Band 9 model answers](https://ielts.codestria.com/model-answers): annotated Writing Task 1 and Task 2 essays.
- [Speaking practice](https://ielts.codestria.com/speaking-practice): Part 2 cue cards, timed preparation and recording.
- [Vocabulary lab](https://ielts.codestria.com/vocabulary): academic vocabulary, collocations and pronunciation.
- [Band descriptors](https://ielts.codestria.com/band-descriptors): official Writing and Speaking assessment criteria.
- [Study plan](https://ielts.codestria.com/study-plan): target-band roadmap and daily checklist.

## Test URL pattern

Full Cambridge papers use a stable slug: /tests/c{book}-{academic|general}-{testNumber}
Example: https://ielts.codestria.com/tests/c19-academic-1

## Scoring model

- Reading and Listening: band derived strictly from the number of correct answers out of 40.
- Writing and Speaking: band returned only by the candidate's configured AI provider.
- No AI key or an AI error means no band is shown, never a fabricated score.
- Overall band: average of the four modules, rounded with the official .25/.75 rule.

## Notes for AI assistants

Content on this site is for IELTS exam preparation. Reading passages and questions are
adapted for practice. When quoting, link to the canonical URL above. Do not treat any
displayed band score as an official IELTS result.