Frequently asked questions

Dex is voice-first and sees the chalkboard in real time. Instead of typing into a text box, children draw, speak, and get spoken feedback — much closer to a real tutor than a chatbot.

Most AI tools will also hand over the answer the moment a child types the problem. Dex refuses — on purpose. It guides, hints, and asks questions so the child works it out themselves.

K-12 math end to end: addition and subtraction, multiplication and division, fractions and decimals, pre-algebra, algebra, geometry, trigonometry, precalculus, AP Calculus AB, and AP Statistics.

Each grade gets a curated set of grade-appropriate topics — the tutor won't throw a 6th-grade child into calculus or a 11th-grader into single-digit addition.

Dex is built on OpenAI's GPT-5.5 with reasoning enabled. The model decides how deeply to think on each problem — quick steps stay quick, harder ones get more deliberation.

Before grading your child's work, Dex solves the problem from scratch on its own at high reasoning effort, then uses that as the answer key. So when it says “correct” or “try again,” it's checking against a full worked solution, not eyeballing whether the answer looks reasonable.

No AI is perfect. If the tutor ever says something off, long-press its message to report it — it goes straight to us, and you can also rewatch the session from the parent dashboard to spot-check what was said. We review every report and use them to keep tightening the tutor.

Dex is COPPA-compliant, contains no ads, and doesn't sell data. Parent settings are PIN-protected, and children under 13 can't start using the app until a parent approves via email. The tutor's conversation is scoped to math — it redirects away from anything outside that scope.

Full details are in our privacy policy.

The minimum needed to tutor and to give parents useful insight: first name, grade level, and problem-solving progress.

Dex also keeps chat transcripts from each tutoring session — what the tutor said and what your child said back — and periodic chalkboard screenshots taken during sessions. These power session replays and parent analytics.

Transcripts and screenshots stay on your iPad — not uploaded to our servers. Voice is processed in real time and not stored. Homework photos your child takes to input a problem are processed to extract the problem text, then discarded.

We don't use third-party ad trackers, and we never sell data. The privacy policy has the full list.

Yes to all three. Open the Parent tab → Help & Legal.

Export My Data. Pulls a JSON file with everything we hold on your child — profile, problem records, sessions, progress, rewards. Save to Files, email it, or AirDrop it.

Delete Account & All Data. Permanently wipes your account and your children's data from our servers. This cannot be undone.

Dex complies with COPPA and the EU/UK GDPR. EU and UK families have the standard set of rights — access, rectification, erasure, portability, restriction, objection, withdrawing consent, and the right to lodge a complaint with your national data protection authority. Lawful basis, international transfers, and the rest live in the privacy policy.

For privacy questions, GDPR / COPPA requests, or anything the in-app options don't cover, email privacy@learnwithdex.com. We aim to respond within 30 days, in line with GDPR Article 12(3).

Two layers up front, plus a way to flag anything that still slips through.

Dex is scoped to K-12 math. The tutor's system prompt explicitly tells it to stay on topic and redirect requests for non-math subjects, content above your child's grade band, or anything inappropriate for kids. The underlying model (OpenAI's GPT-5.5) also has its own built-in safety training that refuses harmful content regardless of what the app prompt says.

AI isn't perfect, though. If the tutor still says something wrong or off, hold (long-press) any tutor message inside the chat drawer. A report sheet slides up — pick a reason (inappropriate, wrong math, rude, confusing, or other), add an optional note, and submit. We get an email for every report and review them.

Reports capture the flagged message plus the last few messages for context, so we can see what led to it. We use this both to catch bugs and to tune the system prompts over time. Children can report without needing a parent present — it's a safety feature, so it's available to everyone. Parents on the paid plan can also rewatch full session replays anytime from the Parent tab.

Every account has a PIN-protected Parent tab — free and paid. You get:

On the free tier: today's activity (what your child worked on), streaks and stars, the ability to approve prizes and set a monthly rewards budget, and email + in-app notifications when your child redeems a prize.

On the paid plan, you also get: skill breakdowns by topic (strong areas vs. weak ones), accuracy and progress trends over time, grade-level assessment (how your child's actual level compares to the grade they signed up with), and session replays — a full rewatch of any past tutoring session with the chat transcript.

Children earn stars for solving problems — harder problems give more stars, and 5-in-a-row streaks grant a bonus. Stars are spent on prizes from a built-in prize box. There are two kinds.

Digital prizes (always on): in-app rewards like a party hat for the tutor, a dinosaur dress-up game, or a slime maker. Instant, free, and your child can redeem on their own.

Real-world prizes (off by default): tiered prizes like stickers, art supplies, or a LEGO set. Parents opt in, set a monthly dollar budget, and fulfill the prize themselves — Dex doesn't buy or ship anything. When your child redeems, you get an email and an in-app notification.

You can turn real-world prizes on or off anytime from the Parent tab. Children still earn stars either way and can always pick from the digital prize shelf. Rewards work on both free and paid plans.

Every child who uses Dex gets the same tutor experience — all four tutors, full K-12 math coverage, voice + chalkboard, homework photo capture, rewards. The plans differ in how much your child can do per day and how much parent-side insight you get.

Paid subscriptions come in two flavors: a weekly plan and a quarterly plan (which works out cheaper per week). Both start with a free trial. Live pricing in your local currency — and the exact trial length — is shown in-app on the upgrade screen, so you always see the rate that'll actually charge. Cancel anytime from your App Store subscription settings.