Comparison

Post Matrix Scan vs Screen Ruler

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

Head to head
About

Post Matrix Scan

Features
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Scan and decode Data Matrix codes on franked mail (DV-Freimachung 1.54, Internetmarke). FEATURES: - Scan Data Matrix codes using your camera - Import images from your photo library - Enter hex data manually - Quick Actions: Long-press the app icon to scan, import image, or enter hex code - View detailed code information including: - Sender identification (crowdsourced) - Product type (letter, parcel, etc.) - Postage value - Submission date - Customer number (EKP) - Contribute sender identifications to help the community - Support for German and English This app decodes the data encoded in postal Data Matrix franking codes, giving you insight into postage information that would otherwise be unreadable. Includes the current product catalog V60 with all postage rates. This app is not affiliated with or endorsed by Deutsche Post AG.

About

Screen Ruler

Features
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PREMIUM โ€” PURCHASE REQUIRED: All features described below are part of Pro and require a purchase: a weekly or yearly auto-renewing subscription, or a one-time lifetime purchase. Lay a coin, a ring, a screw, or a slip of paper directly on your iPhone and read its true size. MeasureLine turns the display into an actual-size on-screen ruler โ€” real millimeter and fraction-inch graduations drawn at 1:1 scale, matched to your exact device. Most ruler apps guess your screen density and hope for the best. MeasureLine looks up the published pixel density for your specific iPhone model, then lets you true it against a bank card โ€” the same 85.60 mm standard everywhere in the world โ€” so the tick marks on the glass line up with the tick marks on a steel rule. WHAT YOU GET โ€ข A ring laid on the glass reads 17.3 mm across โ€” no squinting between the lines of a worn tape โ€ข The mystery screw from the drawer identified before the hardware store closes: lay it down, drag end to end โ€ข 15/16" on the readout instead of 0.94 โ€” fractional inches the way a tape measure speaks โ€ข One 30-second calibration against a bank card, coin, or AA battery, and every reading after it is trued to your screen โ€ข Snap the line to the real graduations so tiny parts land exactly on the millimeter โ€ข Every measurement saved with its own label โ€” "curtain hook", "ring for Anna" โ€” still there when you reach the store PERFECT FOR โ€ข Jewelry makers sizing rings, beads, and clasps without hunting for a caliper โ€ข DIYers matching screws, washers, and drill bits to what is already in the wall โ€ข Sewists and crafters checking buttons, seams, and hems on the spot โ€ข Collectors verifying coin and stamp dimensions against catalog specs WHY NOT JUST USE AN AR MEASURING APP? Camera-based measuring is built for couches, not coins โ€” useful at room scale and hopeless below a few centimeters. For small objects, nothing beats laying the part on a calibrated 1:1 ruler and reading it directly. MeasureLine never opens the camera, and it tells you plainly how each reading was derived: calibrated by you, known device, or estimate. PRIVATE BY DEFAULT No camera, no microphone, no location, no account, no ads, no analytics. Your measurements stay inside the app on your device; the only connection made is to Apple's App Store when you purchase or restore. PREMIUM (PURCHASE REQUIRED) MeasureLine Pro unlocks unlimited saved measurements and the fractional-inch readout. Pick the plan that fits: a Weekly or Yearly auto-renewing subscription, or a one-time Lifetime purchase. Put the tape measure back in the drawer โ€” lay the part on the screen and know its size in seconds. Terms of Use: https://leanstudio.asia/terms-of-use Privacy Policy: https://leanstudio.asia/privacy-policy Support: support@leanstudio.asia

Screenshots

Post Matrix Scan4 screens
Screen Ruler4 screens

Verdict

The call

The clearest difference is in-app purchases: Post Matrix Scan at none against Screen Ruler's 3. Post Matrix Scan also leads on update cadence (weekly vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Screen Ruler sells 3 in-app purchases, starting at $2.99 per 7 days. Post Matrix Scan asks for nothing beyond the download.

UpkeepUpdate frequency

Post Matrix Scan ships an update weekly, Screen Ruler every 4 months. Both last shipped on October 25, 2026.

Scorecard2 real differences ยท 4 level
Post Matrix Scan versus Screen Ruler: the parameters behind the verdict, then further details
ParameterPost Matrix ScanScreen Ruler
PriceFreeFree
Update frequencyWeekly โ€” betterEvery 4 months
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPad โ€” betteriPhone
Requires iOS16.0 โ€” better17.0
Further details โ€” not scored
Size2 MB3 MB
Age rating4+4+
DeveloperPhilipp KursaweLEAN ASIA CO., LTD

In-app purchases

None

Post Matrix Scan

No in-app purchases

3 purchases

Screen Ruler

Subscriptions2
  • Fraction Inch Weekly$2.997 Days
  • Card Calibration Yearly$14.991 Year
One-time1
  • Ring & Screw Lifetime$29.99

Questions

Is Post Matrix Scan free?
Post Matrix Scan is free to download, with no in-app purchases.
Is Screen Ruler free?
Screen Ruler is free to download, with in-app purchases available.
Do Post Matrix Scan or Screen Ruler have ads?
Neither Post Matrix Scan nor Screen Ruler shows ads.
Which is updated more often, Post Matrix Scan or Screen Ruler?
Post Matrix Scan ships an update weekly, and Screen Ruler every 4 months. Most recently, Post Matrix Scan was updated on October 25, 2026 and Screen Ruler on October 25, 2026.

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