Comparison

Ruler / Measuring Tape vs iScan

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

Head to head
About

Ruler / Measuring Tape

Measure objects using your device's screen, augmented reality, or by printing a ruler. Offers three distinct methods for on-demand measurement without physical tools.

Highlights
  • Measure against screen
  • Augmented reality measurement
  • Printable ruler via AirPrint
  • ARKit integration
  • No ads or in-app purchases
Read full description

Three ways to measure when you don't have a measuring tape or a ruler: 1 – AGAINST YOUR SCREEN Simple and precise for small measurements. 2 – IN AUGMENTED REALITY Place a virtual measuring tape on a vertical or horizontal surface, such as a wall, table or floor. Built with ARKit. 3 – USING AIRPRINT Print a ruler! Accuracy depends on the printer, so check the result against the on-screen ruler. NO ADS / NO IN-APP PURCHASES / NO TRACKING If you enjoy this app, discover "Print to Size" and my other independent apps at clafou.com

About

iScan

Features
Read full description

iScan-D is a document scanner for anything from receipts and contracts to posters — no fixed page size. Capture, de-skew, OCR, search, and export all happen on your device. There's no sign-in, and your images and recognized text are never sent to a server. ■ Two scan modes • Normal scan: capture receipts, business cards, postcards, and everyday documents one sheet at a time. • Long scan: move the camera slowly downward to stitch a very long receipt into a single tall image. ■ Import from your photo library Already have a photo? Select one or several and bring them in as pages — no need to reshoot. ■ Precise cropping and de-skewing • The document's four corners are detected automatically. Fine-tune them by hand, with a magnifier so your finger never hides the corner. • A perspective transform straightens the page so a photo taken at an angle looks like it was shot head-on. • Corner cropping and a final rectangular crop are separate steps. ■ Finishing touches • Rotate, rectangular crop, brightness, contrast, saturation, sharpness, grayscale. • One-tap "Enhance" removes shadows and uneven lighting, whitens the background, and makes text crisp. • Brightness, contrast, and saturation preview in real time and can each be reset individually. ■ OCR in 9 languages Japanese, English, Italian, Spanish, French, German, Korean, and Chinese (Simplified / Traditional). OCR runs on device using Apple's technology, and the language follows your app language automatically. Recognized text is fully editable, and pages that fail recognition can be typed in by hand. ■ Find it, share it • Full-text search across titles, notes, and OCR text, with a snippet of the matching text. • PDF export embeds an invisible text layer so you can search inside the exported PDF. • Export as PDF, JPEG, or PNG, with paper sizes (A4, A5, B5, Letter, custom) and image sizes (original, large, medium, small, custom). • Combine multiple pages into one PDF in order and share it. ■ Organize and manage • Give each document a title and a note; the title is generated from the capture date. • The original image is always kept, so you can redo corner adjustment, perspective, editing, and OCR even after saving. • Deleted documents go to Trash. They can be restored for 10 days, then are permanently deleted automatically. You can also delete permanently right away. ■ Privacy • Images, OCR results, and document information are never sent off device. • All key processing, including OCR, works on device and offline. • No account or sign-in. • No cloud sync or built-in backup. ■ Requirements Supports the latest iOS and the two previous major versions. Works on iPhone and iPad. Note: This app shows a banner ad (Google AdMob) at the bottom of the document list.

Screenshots

Ruler / Measuring Tape4 screens
iScan4 screens

Verdict

The call

The clearest difference is ads: Ruler / Measuring Tape at none against iScan's shown. Ruler / Measuring Tape also leads on iOS requirement (16.0 vs 18.0). iScan's advantage is update cadence (every 9 days vs every 4 months). On price, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Ruler / Measuring Tape ships an update every 4 months, iScan every 9 days. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
Ruler / Measuring Tape versus iScan: the parameters behind the verdict, then further details
ParameterRuler / Measuring TapeiScan
PriceFreeFree
Rating4.4 (238 ratings) — better—
Positive reviews50.7% of reviews—
Number of ratings238 — better—
Update frequencyEvery 4 monthsEvery 9 days — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.0 — better18.0
Further details — not scored
Size6 MB8 MB
Age rating4+4+
DeveloperClafou Ltdkenta isomi

Bugs and requests

Ruler / Measuring Tape

Reported bugs

26 issues
  • Cannot accurately measure anything
  • Force turns off the flashlight
  • Shows totally wrong scale on iPhone 15 Pro Max
  • cm and inch are in reverse directions
  • Ne s’adapte pas au zoom de l’écran
Show 21 more
  • Wouldn’t detect any surface
  • Incorrect for iPad 7th Gen
  • Doesn’t work as advertised (requires camera access)
  • Impossibilité de mesurer des verticales
  • Sólo sirve para cosas pequeñas
  • Pas fiable, mesures différentes comparées avec un mètre-ruban
  • Ne fonctionne pas
  • Ne marche pas
  • Tardo años, no sirve
  • Can’t detect flat surface
  • iPhone 6s: marche une fois sur dix
  • Keeps analysing repeatedly with no recognition whatsoever
  • Funktioniert nicht
  • No vale para nada, no funciona y no detecta el suelo ni la mesa
  • Todavía no entiendo para que sirve
  • The augmented reality doesnt work accurately and the rules wont allow us to touch the screen
  • Not working at all
  • Ne semble pas fonctionner, passe son temps à analyser
  • L'app prends énormément de temps à analyser
  • AR läuft nicht, erkennt keine Fläche
  • Can’t get it to measure anything

Requested features

9 requests
  • Option to change ruler pips (16/1, 8/1)
  • Scrolling ruler for longer objects
  • Button to turn on flashlight
  • Compatibility for iPad Air 2
  • Tutorial or instructions
Show 4 more
  • Numeric measurements near the rule
  • Ability to take multiple measurements simultaneously
  • Dark mode option
  • Advanced analytics dashboard

iScan

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Ruler / Measuring Tape

No in-app purchases

None

iScan

No in-app purchases

Questions

Is Ruler / Measuring Tape free?
Ruler / Measuring Tape is free to download, with no in-app purchases.
Is iScan free?
iScan is free to download, with no in-app purchases.
Do Ruler / Measuring Tape or iScan have ads?
iScan shows ads; Ruler / Measuring Tape does not.
Which is updated more often, Ruler / Measuring Tape or iScan?
Ruler / Measuring Tape ships an update every 4 months, and iScan every 9 days. Most recently, Ruler / Measuring Tape was updated on November 6, 2026 and iScan on October 31, 2026.

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