Comparison

Angle Gradient Inclinometer vs HTML Viewer

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

Head to head
About

Angle Gradient Inclinometer

Easily measure tilt angles with this free protractor app. It displays inclination from 0 to 359 degrees, along with gradient percentages and angles summing to 180 or 360 degrees. Switch to theodolite mode to set a specified angle to zero.

Highlights
  • Measure tilt angles 0-359 degrees
  • Display gradient percentage
  • Show sum angles (180/360)
  • Theodolite mode
  • Set specified angle to zero
Features
Read full description

Simple tilt angle protractor free application that can easily measure tilt simply by tilting the device. The angle of inclination measured from 0 degree to 359 degrees, converted gradient (%), angle at which sum is 180 degrees / 360 degrees are displayed at the same time. You can switch to the theodolite, the specified angle can be set to 0 degree. ( 45 Degrees = Gradient 100 % )

About

HTML Viewer

This app displays standalone HTML sites, individual HTML pages, PDFs, and EPUB books and comics offline. It renders HTML content like a browser, supporting CSS, JavaScript, and WebAssembly. Users can highlight, take notes, and search across files and even scanned PDFs.

Highlights
  • Full HTML rendering with CSS, JavaScript, and WebAssembly
  • Built-in PDF reader with continuous scrolling and scaling
  • EPUB and comic support (CBZ, CBR, etc.) with various reading modes
  • Highlighting, notes, and bookmarks
  • Offline access to all content
  • Search across folders and scanned PDFs
  • iCloud sync for reading progress and notes
Features
Read full description

Pagira opens your HTML sites and pages, your comics in CBZ, CBR, CB7 and CBT, your EPUB books and your PDFs, on iPhone and iPad, even offline. A complete web folder (HTML, CSS, JavaScript, images, subfolders) displays just like in a browser, locally, with no connection. HTML SITES AND PAGES - Full rendering: CSS, JavaScript, images and subfolders genuinely work. fetch/XHR, ES modules and even WebAssembly are supported, because the content is served through a real local web origin, not a simple file preview. - A site in a .zip is uncompressed and opened in one tap. .webarchive files open as they are. - Ideal for courses exported as HTML (medicine, law and other fields) and e-learning modules, technical documentation shipped as a website (electronics, mechanics, manuals, datasheets), generated documentation (Doxygen, Sphinx, MkDocs, Docusaurus, Storybook, Javadoc), Jupyter notebooks, R Markdown and reports saved as HTML, or web pages to keep for later. COMICS AND MANGA - CBZ, CBR, CB7 and CBT, as well as .zip, .rar, .7z or folders that hold only pictures. - Two-page spreads on iPad, manga reading direction, vertical scrolling. - Panel by Panel reading: each panel grows and the balloons read without zooming, even on iPhone. BOOKS AND PDFS - EPUB books with light, sepia and dark themes. - PDFs: continuous scrolling, go to page, contents and thumbnails. - Word, Markdown, RTF and text too. - Highlights, notes and bookmarks in your books and PDFs. SEARCH - Search a whole folder, even scanned PDFs (text recognized on the device), and by file name. - Ask: ask a question, Pagira opens the page that answers it. Nothing made up. OFFLINE AND ICLOUD - 100% offline: once the content is on your device, everything opens without a connection. Perfect on a plane or where there is no network. - Open from the Files app (local storage, iCloud Drive, network server) or via "Open in Pagira" from other apps. - iCloud on demand: files are read as you go, without downloading everything, or downloaded in one tap for a permanent offline copy. Automatic resume after an interruption. - iCloud sync: page, highlights, notes and favorites follow you between iPhone and iPad. HOME AND HISTORY - Home: Currently Reading, Favorites, Recent and Offline, with their covers. - History: every page you have viewed, including within a site, grouped by day, and reopened right where you left off. - Your last reading reopens at launch (can be turned off). Universal (iPhone and iPad, in both orientations) and available in English, French, German, Spanish, Italian, Dutch, Polish and Portuguese. PRIVACY Pagira collects nothing, tracks no one and requires no account. Your files stay on your device and in your iCloud: nothing is sent to a server. No ads, no tracking. TRIAL AND PURCHASE Try Pagira for free with all its features (up to 20 document openings, opening a folder doesn't count). After that, a single purchase, with no subscription, unlocks the app for good: Pagira Pro, or Pagira Pro Supporter, shared with your whole family.

Screenshots

Angle Gradient Inclinometer1 screens
HTML Viewer4 screens

Verdict

The call

The clearest difference is review sentiment: Angle Gradient Inclinometer at 51% against HTML Viewer's 0%. Angle Gradient Inclinometer also leads on in-app purchases (none vs 5) and ratings volume (314 vs 2). HTML Viewer's advantage is ads (none vs shown) and update cadence (weekly vs every 8 months). On price and device support 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. HTML Viewer sells 5 one-off in-app purchases. Angle Gradient Inclinometer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Angle Gradient Inclinometer holds the better App Store score, 4.3 against 4.0. That said, the two scores are not equally well evidenced: Angle Gradient Inclinometer has 314 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 51% of Angle Gradient Inclinometer's written reviews are positive against 0% of HTML Viewer's.

UpkeepUpdate frequency

Angle Gradient Inclinometer ships an update every 8 months, HTML Viewer weekly. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.

Scorecard8 real differences · 2 level
Angle Gradient Inclinometer versus HTML Viewer: the parameters behind the verdict, then further details
ParameterAngle Gradient InclinometerHTML Viewer
PriceFreeFree
Rating4.3 (314 ratings) — better4.0 (2 ratings)
Positive reviews51.1% of reviews — better0.0% of reviews
Number of ratings314 — better2
Update frequencyEvery 8 monthsWeekly — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supportedFree — better
DevicesiPhone, iPodiPhone, iPad
Requires iOS13 — better17.0
Further details — not scored
Size11 MB14 MB
Age rating4+4+
DeveloperSHIGETO TAKAGIJimmy DE BRUYNE

Customer experience

Angle Gradient Inclinometer

All ratings295 ratings
Positive83.7%
Neutral4.1%
Negative12.2%
Written reviews45 reviews
Positive51.1%
Neutral15.6%
Negative33.3%

HTML Viewer

All ratings2 ratings
Positive50.0%
Neutral50.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

In-app purchases

None

Angle Gradient Inclinometer

No in-app purchases

5 purchases

HTML Viewer

One-time5
  • Buy Me a Coffee$2.99
  • Buy Me a Dessert$4.99
  • Buy Me a Meal$8.99
Show 2 more
  • Pagira Pro$11.99
  • Pagira Pro Supporter$22.99

Questions

Is Angle Gradient Inclinometer free?
Angle Gradient Inclinometer is free to download, with no in-app purchases.
Is HTML Viewer free?
HTML Viewer is free to download, with in-app purchases available.
Which has better reviews, Angle Gradient Inclinometer or HTML Viewer?
Angle Gradient Inclinometer is rated higher. Angle Gradient Inclinometer averages 4.3 out of 5 from 314 ratings, while HTML Viewer averages 4.0 from 2 ratings.
Do Angle Gradient Inclinometer or HTML Viewer have ads?
Angle Gradient Inclinometer shows ads; HTML Viewer does not.
Which is updated more often, Angle Gradient Inclinometer or HTML Viewer?
Angle Gradient Inclinometer ships an update every 8 months, and HTML Viewer weekly. Most recently, Angle Gradient Inclinometer was updated on October 29, 2026 and HTML Viewer on October 31, 2026.

Other comparisons