Field Guide vs Underfoot

Most facts go in one ear and out the other. Field Guide is built so they don't. Each lesson takes two or three minutes and follows a simple loop proven to build memory: you predict an answer first, you get taught one clear idea, then you're quizzed on it. Guessing before you learn is the trick that makes it stick. Then spaced review brings each lesson back days later, right before you'd forget, so it moves into long-term memory instead of fading by tomorrow. WHAT'S INSIDE Hundreds of lessons across science, history, money, health, art, engineering and more A predict → teach → check loop that's actually fun Spaced review that schedules itself A streak to keep you honest Clean, calm, no-fluff design. No ads, no clutter. Browse by subject, get a fresh lesson each day, or hit Random and learn something new right now. Field Guide works fully offline, and new lessons arrive automatically.

Underfoot is a field guide for anyone who can't walk past a bug without stopping to look. Photograph an insect, spider, or under-a-rock critter, get an AI identification suggestion, and add an illustrated specimen card to your collection. Try 5 photo identifications free in total, not per day. After those, more photo IDs require an Underfoot Pro subscription. No subscription starts automatically. Failed requests and photos with no identifiable bug do not use a free ID. Saving and browsing finds and the field guide are always free. HOW IT WORKS • Identify and compare. Check the suggestion against real reference photos, or choose a different species from the guide. AI can make mistakes. • Explore over 2,000 species. Browse insects, spiders, roly-polies, millipedes, snails, and other small creatures, with AI-generated illustrations in an ink-and-watercolor style. • Keep your own photos. See your find beside a reference image, enlarge either photo, and explore available life-stage images. • Collect wild finds. Save a species outside the bundled guide with an illustration generated for its card. • Know where to look. Read habitat tips, see seasonal suggestions, and explore nearby parks and trails. • Try something outside. Optional field activities and five observation walks help you slow down and notice more. QUIET BY DESIGN No public profiles, messaging, advertising SDKs, or cross-app tracking. Your nickname, collection photos, and field-activity progress stay on your device. Your collection is available offline. A parent should supervise a child's use. Photo identification requires your consent and an internet connection. Your selected photo goes through Underfoot's Firebase server to Google Gemini without your nickname or location. Anonymous identifiers, request counts, and technical diagnostics support the service; Google may retain requests for safety checks. Location is optional. See our privacy policy for details and deletion options. FREE & PRO Start with 5 free photo IDs. Pro provides more photo identifications with a monthly or yearly auto-renewable subscription. Prices and billing intervals are shown before purchase. Paid subscriptions renew automatically until canceled in your Apple account settings. Restore purchase is available on the Pro screen. Saving and browsing finds never requires Pro. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://underfoot.web.app/privacy