BugLens vs Perf
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BugLens
Instantly identify insects using your device. Discover details about harmful species and save your favorite finds to a personal list. This app offers a comprehensive way to learn about the insect world around you.
- Insect Identification
- Harmful Insect Identification
- Favorite Insect List
- Subscription Management
- Account Settings
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Best Insect Identification App Key Features: - Insect Identification - Harmful Insect Identification - Favorite Insect List *Subscription Information: Monthly Subscription Yearly Subscription • Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. • Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. • Any unused portion of a free trial period will be forfeited when the user purchases a subscription. • Payment will be charged to iTunes Account at confirmation of purchase. • Account will be charged for renewal within 24 hours prior to the end of the current period. The cost depends on the selected plan. Terms of Use: https://sites.google.com/view/buglenstou/ Privacy Policy: https://sites.google.com/view/privacybuglens/
Perf
This app helps identify stamps from photos, providing confidence levels and reasons for its assessments. It also offers tools to manage your stamp collection, including page scanning and condition grading, all while keeping your data private on your devices.
- Stamp identification from photos
- Confidence levels and reasons for identification
- Full page album scanning
- Collection management with notes and condition
- Perforation gauge and condition grading tools
- Private iCloud syncing across devices
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Perf identifies stamps, tells you how sure it is, and keeps your collection. No account. No ads. Nothing leaves your phone but the photo you choose to scan. TRY IT BEFORE YOU PAY Five identifications a day, every day, on the standard plan — plus a full album page scan every month. You will know whether Perf works on your stamps before it ever asks you for money. Most scanner apps give you two scans and then a price. That is not how you buy a tool. IT TELLS YOU WHEN IT ISN'T SURE Every identification comes with an honest attribution: confident, or likely-and-worth-verifying, with the reason stated plainly — perforation, centering, a variety that needs a second look. When Perf is unsure it shows you the alternatives instead of one confident guess. An identifier that is quietly wrong is worse than one that admits it. SORT A WHOLE PAGE AT ONCE Photograph an album page or a stockbook sheet and Perf finds every stamp on it, identifies each one, and lays them out for you to confirm or correct together. Inherited a collection? This is the difference between an afternoon and a winter. IT WILL NOT INVENT WHAT YOUR STAMP IS WORTH Perf does not price stamps. No catalog publisher is licensed to it, so rather than guess at a figure it says so plainly and leaves the appraising to appraisers. Identifying a stamp, measuring its perforations and keeping your album do not depend on a price. Nobody's stamp is worth more because an app said so. A REAL ALBUM, NOT A SCAN HISTORY Stamps mount in pages by country. Record condition, quantity, notes and how you came by each one. Sort, search your own collection in plain words, mark duplicates for trade, keep a want list and get told on the review screen when a new scan fills a gap. Everything syncs privately across your own devices through iCloud, with no login, ever. THE COLLECTOR'S TOOLS, ON SCREEN A perforation gauge you lay your own stamp against, calibrated to your screen so the teeth measure true. Your measurement, not Perf's guess, and often the thing that settles an attribution. Condition grading suggested from your photo with the cues it used. Variety, overprint and postmark reading. Plain-language explanations of the philatelic terms Perf uses, for anyone who has just inherited an album and does not yet speak the language. PERF PRO The standard plan keeps working forever, and anything you have mounted stays yours. Pro adds unlimited identifications, unlimited page scans, a collection-wide insight report and CSV export. One year, or one payment for good. Questions or requests: https://scalingwebapps.com/contact.php --- ——— This app offers an auto-renewable subscription. Payment is charged to your Apple Account at purchase confirmation. It renews automatically unless turned off at least 24 hours before the current period ends; your account is charged for renewal within 24 hours before the period ends. Manage or cancel anytime in your Apple Account settings. Prices may vary by region. A one-time lifetime purchase is also available. Privacy Policy: https://scalingwebapps.com/policies/perf-privacy-policy.php Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is ads: Perf at none against BugLens's shown. BugLens's advantage is ratings volume (55 vs 5) and iOS requirement (13.0 vs 17.0). On price, rating, in-app purchases and monetization model 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
Both are free to download. BugLens sells 3 in-app purchases, starting at $4.99 per month and Perf sells 2 in-app purchases, starting at $19.99 per year. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for BugLens against 5.0 for Perf. That said, the two scores are not equally well evidenced: BugLens has 55 ratings behind it against 5, so its average is the more settled of the two.
| Parameter | BugLens | Perf |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (55 ratings) | 5.0 (5 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 55 — better | 5 |
| Update frequency | Every 4 months | — |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Freemium |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 37 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Vu Quoc Viet | SCALINGWEB TECHNOLOGIES |
Customer experience
BugLens
Perf
In-app purchases
BugLens
- Monthly Premium ($4.99)$4.991 Month
- Yearly Premium ($24.99)$24.991 Year
- $69.99 Use Forever$69.99
Perf
- Pro Yearly7 Days trial$19.991 Year
- Pro Lifetime$49.99




