Questions, bug reports, purchases and your data. Replies usually come within two days.
Email: napahlm.dev@gmail.com
Include where it happened (the website or the app), the version shown under Settings > Version, and what went wrong. A screenshot helps.
From inside the app, the bug key on the home screen (or Settings > Report a bug or suggest something) sends a report straight to the developer. No email needed, and a reply address is optional.
Subbing is built and supported by one developer in Norway. Every report is read.
Every topic and every mode is free. Pro removes ads and adds the study tools: retry your misses, practise weak spots, round setup, custom timed rounds and round history. It is a one-time purchase, not a subscription.
Pro belongs to the store account that bought it. Open Settings > Restore purchases on a device signed in to that account. If it still does not come back, email the store receipt.
Purchases are charged and refunded by the store you bought from, not by the developer. On iPhone and iPad, use reportaproblem.apple.com. On other devices, open the order history in the store you bought from.
Try Restore purchases first. If that fails, email the receipt from the store and the version from Settings; the purchase is checked and unlocked by hand.
Free users see a small banner on the home and results screens and an occasional full-screen ad between rounds, never during a question. In the EU and UK the consent choice can be changed under Settings > Privacy options. Subbing Pro removes all ads.
No. There is no login and no email. Streak, stats and round history stay on the device; Settings > Reset stats, streak and history clears them.
Competitive scores are stored with the name typed when they were submitted. To remove one, email the name, the topic and roughly when it was submitted.
What is processed and why is in the privacy policy.
Every question is generated and graded by the same code, so a wrong working is a bug worth fixing. Send it from the app with the Correction category, or email the question text and the expected answer.
Subnetting, IPv6, ports and protocols, VLSM, binary and hex, ACL wildcards and Linux permissions, aimed at CCNA, Network+, Security+, Linux+ and RHCSA. The guides explain the methods.