Bubble Level & Inclinometer vs ShelfCheck Pro

Bubble Level & Inclinometer turns your phone into a fast, trustworthy level and angle finder — for DIY, trades, and everyday fixes. Get a true reading in under a second: • 2D bullseye level for flat surfaces • Horizontal & vertical spirit level • Full inclinometer / angle finder in degrees, percent grade, mm/m and roof pitch (x:12) Built to be trusted: • Guided 180° calibration wizard — calibrate once, trust every reading • Tolerance mode with OK / NEAR / OUT haptic and sound guidance, so you can work without staring at the screen • Confidence bar shows how stable the reading is • Hold / Freeze, relative zero (Set 0), measurement history with CSV export, and a shareable measurement card Perfect for: • Hanging pictures, shelves and frames perfectly straight • Checking roof pitch and slopes • Leveling an RV, trailer, appliance or furniture • Tiling, decking, ramps and stairs • Woodworking angles, miter and crown molding No ads. No limits. No subscriptions. No data collected. Works 100% offline. Most level apps bury the measurement under ads and paywalls. This one doesn't. It stays out of your way, respects your privacy, and just measures — accurately, every time.

Never buy the same book twice. ShelfCheck is the fastest way to check if you already own a book before you buy it. Just point your iPhone at the barcode, and in under a second you get a clear answer: red for owned, green for new, amber for a possible different edition. Built for book collectors, avid readers, and anyone who has ever come home from a bookstore only to realize they already had that book on the shelf. KEY FEATURES Instant Duplicate Check Scan any ISBN barcode and get immediate feedback. Three-layer matching checks exact ISBN, title and author fuzzy match, and online database lookup to catch duplicates even across different editions. Works Offline No Wi-Fi at the used book sale? No problem. ShelfCheck checks your entire local library instantly without an internet connection. Online metadata lookup happens in the background when you are back online. Zero Friction No account to create, no cloud service to sign up for, no social features to distract you. Open the app and start scanning. Your data stays on your device. Continuous Scan Mode Toggle continuous mode to scan dozens of books in minutes. Each scan shows instant feedback and automatically moves to the next. Perfect for cataloging an entire bookshelf or browsing a library sale. Your Book Library Browse all your books in a clean list view. Search by title, author, or ISBN. Sort by date added, title, or author. Filter by tags to find any book in seconds. Book Details and Notes Tap any book to see full details including cover, publisher, page count, and more. Add personal notes, mark books as read, and track which books you have lent out and to whom. Custom Tags and Lending Tracker Organize your collection with custom tags. Track lent books with borrower name and date. Never lose track of who has your favorite novel again. CSV Export Export your entire library as a CSV file for backup or import into other tools. Your data, your way. Manual Book Entry No barcode? No problem. Add books manually by entering the title, author, and ISBN. The app will still check for duplicates and look up metadata automatically. Smart ISBN Handling Automatically normalizes ISBN-10 and ISBN-13 formats. Handles hyphens, spaces, and prefix variations so you never miss a match. Default Shelf Location Set a default shelf location in Settings so every new book is automatically assigned to the right spot on your bookshelf. PRIVACY FIRST ShelfCheck collects no personal data. No analytics, no tracking, no third-party sharing. Your book library is your business. FREE TO USE Scan and check books with no limits. Store up to 50 books for free. Upgrade to Pro for unlimited books, continuous scan, custom tags, lending tracker, and CSV export. PRO SUBSCRIPTION Unlock the full power of ShelfCheck with a Pro subscription: - Monthly: $1.99/month - Yearly: $9.99/year (58% savings) - Lifetime: $19.99 one-time purchase All Pro plans include a 7-day free trial (monthly and yearly). SUBSCRIPTION INFORMATION: - Payment will be charged to your Apple ID account at confirmation of purchase. - Subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. - You can manage and cancel your subscriptions by going to your account settings on the App Store after purchase. - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription.