Comparison

Protractor vs Nap24h

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

Head to head
About

Protractor

Features
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PAID ACCESS REQUIRED Protractor is a paid app. A weekly or yearly auto-renewable subscription, or a one-time lifetime purchase, is required to use every feature after onboarding. There is no free version and no free trial. Measure any angle without a physical protractor. Drag two arms across the screen, aim the camera at a real object, or rest your phone on a slope and read the tilt live. Most angle apps give you one trick. Protractor gives you three measuring surfaces in one app — an on-screen protractor for photos and drawings, a see-through camera overlay for real objects, and a motion-sensor inclinometer for surfaces you can put your phone on. Every reading comes out in degrees, radians or percent grade, and roof work gets the rise-in-12 pitch on the same screen. WHAT YOU GET - Read the exact degree of any corner on a photo or drawing by dragging two arms and the vertex onto it - Point the camera at a wall, ramp, roof edge or shelf and measure the angle right on the live view - Turn your phone into a digital level that shows pitch, roll, percent grade and roof pitch as rise:12 at once - Lock a reading with Hold or Freeze so the number stays put while you climb down or move the phone - Keep every measurement in History with a photo thumbnail, plus your saved count, average and widest angle - Switch between degrees, radians and grade in one tap, with a built-in conversion table for common values PERFECT FOR - DIY and home projects: shelves, picture rails, ramps, furniture - Roofing, decking and construction: slope, grade and pitch checks - Woodworking and metalwork: bevels, miters and corner angles - Students and teachers measuring angles on diagrams and photos WHY NOT JUST USE A PLASTIC PROTRACTOR A plastic protractor only works on paper, only reads what fits inside its arc, and is never in your pocket when the roof needs checking. This one measures on a photo, through the camera, or straight off a surface — and it remembers every reading instead of you writing them on a scrap of wood. PRIVACY Everything is measured and stored on your device. No account, no sign-up, no cloud upload of your photos or readings. The camera feed is used only to draw the protractor on top of it, and the app works with no internet connection. FULL ACCESS Full access unlocks the camera protractor, the live inclinometer, saved measurement history and all angle units. It is offered as a weekly subscription, a yearly subscription, or a one-time lifetime purchase. Your exact plan and price are shown before you confirm, and subscriptions renew until cancelled in your App Store settings. Open Protractor, point it at the next angle you need, and get the number in seconds. Terms of Use (EULA): https://web-levi.web.app/terms Privacy Policy: https://web-levi.web.app/privacy-policy Questions? Email tphuc.work@gmail.com

About

Nap24h

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nap24h là ứng dụng nạp tiền điện thoại và data cho tài khoản nap24h.net, đồng thời giúp bạn tra cứu lịch sử, theo dõi biến động số dư và quản lý bảo mật. TÍNH NĂNG • Nạp tiền điện thoại mọi nhà mạng • Nạp data 3G/4G/5G, chọn gói theo chu kỳ • Nạp đa mạng: 1 mệnh giá cho nhiều số cùng lúc • Đặt lịch nạp tự động cho danh sách SIM • Thư viện SIM: quản lý và theo dõi số điện thoại • Tra cứu hóa đơn & dịch vụ • Xem lịch sử giao dịch và chi tiết đơn • Dòng tiền: lọc theo thời gian và nguồn • Hộp thư bảo mật: cảnh báo đăng nhập thiết bị mới, đổi email • Cài đặt: đổi mật khẩu, Face ID/Touch ID, PIN giao dịch, thiết bị tin cậy YÊU CẦU • Cần Internet • Tài khoản nap24h đã đăng ký CHÍNH SÁCH • Bảo mật: https://nap24h.net/privacy • Điều khoản: https://nap24h.net/terms • Xóa tài khoản: https://nap24h.net/account-deletion

Screenshots

Protractor4 screens
Nap24h4 screens

Verdict

The call

The clearest difference is in-app purchases: Nap24h at none against Protractor's 3. Nap24h also leads on update cadence (every 9 days vs every 6 weeks). On price, ads, device support and iOS requirement 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. Protractor sells 3 in-app purchases, starting at $4.99 per 7 days. Nap24h asks for nothing beyond the download.

UpkeepUpdate frequency

Protractor ships an update every 6 weeks, Nap24h every 9 days. The most recent releases landed on November 11, 2026 and November 10, 2026 respectively.

Scorecard2 real differences · 4 level
Protractor versus Nap24h: the parameters behind the verdict, then further details
ParameterProtractorNap24h
PriceFreeFree
Update frequencyEvery 6 weeksEvery 9 days — better
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhoneiPhone
Requires iOS17.016.4 — better
Further details — not scored
Size5 MB29 MB
Age rating4+4+
DeveloperPhuc PhamVu Tran Huu

In-app purchases

3 purchases

Protractor

Subscriptions2
  • Incline Gauge Weekly$4.997 Days
  • Roof Pitch Yearly$24.991 Year
One-time1
  • Bevel & Degree, Pay Once$49.99
None

Nap24h

No in-app purchases

Questions

Is Protractor free?
Protractor is free to download, with in-app purchases available.
Is Nap24h free?
Nap24h is free to download, with no in-app purchases.
Do Protractor or Nap24h have ads?
Neither Protractor nor Nap24h shows ads.
Which is updated more often, Protractor or Nap24h?
Protractor ships an update every 6 weeks, and Nap24h every 9 days. Most recently, Protractor was updated on November 11, 2026 and Nap24h on November 10, 2026.

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