Terms of Use
Last updated: 18 September 2026
Educational reference
Kayf explains how devices work for educational purposes. It is not a repair manual, a safety certification or professional advice. Always follow the manufacturer's manual, and use a qualified technician for any repair involving mains electricity, gas, refrigerants or pressure vessels. Medical devices are described as engineering only; nothing in the app is medical advice.
Accuracy
Figures such as power, speed and efficiency are typical values and vary between models. We do our best to keep the content accurate and welcome corrections at the address below.
Purchases
Kayf Pro is a one-time, non-consumable in-app purchase handled by Apple. It unlocks every device, all troubleshooting guides, every quiz and device comparison, on every device signed in with the same Apple ID, and can be restored from Settings. Refunds are handled by Apple under App Store terms.
Intellectual property
The app, its text, illustrations and code are the work of Tariq Al-Aqrabawi. You may use them for personal, non-commercial learning.
Liability
The app is provided as is. To the extent permitted by law, we are not liable for any damage arising from use of the information in it.