Comparison

buggydex vs Underfoot

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

buggydex

Features
Read full description

- Use insect-rnapp to detect and recognize insect you see around you! - If you encounter an unknown insect and wonder if it is dangerous, you can use insect-rnapp to get information about it. - As you encounter more and more insect, you personal collection will be filled with their data to record your achievement.

About

Underfoot

Features
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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

Screenshots

buggydex4 screens
Underfoot4 screens

Verdict

The call

The clearest difference is in-app purchases: buggydex at none against Underfoot's 2. buggydex also leads on device support (3 vs 1) and iOS requirement (13.4 vs 17.0). Underfoot's advantage is update cadence (every 2 months vs every 26 months). On price and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Underfoot sells 2 in-app purchases, starting at $2.99 per month. buggydex asks for nothing beyond the download.

UpkeepUpdate frequency

buggydex ships an update every 26 months, Underfoot every 2 months. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 2 level
buggydex versus Underfoot: the parameters behind the verdict, then further details
ParameterbuggydexUnderfoot
PriceFreeFree
Update frequencyEvery 26 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.4 — better17.0
Further details — not scored
Size48 MB102 MB
Age rating4+4+
DeveloperFei WUJason Brannon

In-app purchases

None

buggydex

No in-app purchases

2 purchases

Underfoot

Subscriptions2
  • Underfoot Pro$2.991 Month
  • Underfoot Pro Annual$24.991 Year

Questions

Is buggydex free?
buggydex is free to download, with no in-app purchases.
Is Underfoot free?
Underfoot is free to download, with in-app purchases available.
Do buggydex or Underfoot have ads?
Neither buggydex nor Underfoot shows ads.
Which is updated more often, buggydex or Underfoot?
buggydex ships an update every 26 months, and Underfoot every 2 months. Most recently, buggydex was updated on October 30, 2026 and Underfoot on October 31, 2026.

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