Comparison

Grindcalculator vs i PixScan

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

Head to head
About

Grindcalculator

This tool simplifies knife sharpening by calculating the correct angle, eliminating the need for manual marking. Save custom sharpening angles and grinding wheel dimensions for consistent results across various brands and types of sharpening tools.

Highlights
  • Precise angle calculation
  • Eliminates manual marking
  • Save custom angles
  • Save grinding wheel dimensions
  • Supports all grinder brands
  • Offline functionality
Read full description

The sharpening calculator is the perfect tool for sharpening knives. Especially when sharpening knives, it is important that the correct angle is resharpened. Most manufacturers, such as Tormek, Einhell, Scheppach, Record Power and many others supply an angle gauge specially designed for the machine. It takes a lot of practice to set the machine correctly with the gauge in order to be able to sharpen the correct sharpening angle on the knife or any other sharpening piece. Professionals often mark their phase to adjust the toolbar to the correct height. We developed the sharpening calculator app to make it easier to sharpen or sharpen knives and, above all, to get a consistently good sharpening result. The annoying phase marking is no longer necessary. Just like the complicated application of the angle gauge to the clamped sanding pad and the adjustment of the toolbar. There is almost no limit to the detection of grinders, grinding wheels and grinding pieces. Grinding pieces are, for example, kitchen knives, wood chisels or planer knives. Everything that can be ground with a wet grinding machine. After the app has been installed, the basic dimensions for the top toolbar, the front bar and, if available, the front base must be entered as described in our tutorial. The values can be adjusted at any time if you have measured yourself. The grinding wheels can either be saved or adjusted again for each grinding process. Here it is important that CBN wheels, for example, always have the same diameter, but wet grinding stones lose diameter through use. This value must be adjusted before grinding. The grinding calculator is suitable for probably every grinding machine from all manufacturers. Even individual structures can be used. Many app users have bought various grinding wheels from, for example, grinding junkies. The grinding calculator also works perfectly for this. With some polishing wheels, an angle correction can be stored so that polishing works even better. If you have recurring sharpening pieces such as kitchen knives, it is possible to save them with the respective sharpening angle. This eliminates the need to measure the angle again when resharpening and everything goes much faster. The grinding calculator is now also available for the iPad. All functions can be used. If you allow access to the iCloud, then all entries are synchronized between the devices. This means that all devices, grinding wheels and grinding pieces are synchronized on all devices used such as iPhone and iPad. This process is also the only thing for which the grinding computer needs an internet connection. Otherwise, the app works anytime, anywhere, even without an active internet connection. With family sharing, each user has their own database. It is currently not possible to share your own devices between users. Further features are described on our website https://www.grindcalculator.de. The procedure is described in detail in the operating instructions, which can be found under the URL https://www.grindcalculator.de/tutorials/operation-manual.

About

i PixScan

Features
Read full description

iPixScan is a powerful and easy-to-use document scanner app that turns your phone into a portable scanner. With its advanced scanning features, you can scan receipts, notes, contracts, business cards, whiteboards, and other documents with just a tap. Whether you're at home, in the office, or on the go, iPixScan ensures you never lose track of important documents again. Key Features: High-Quality Scanning: Capture documents with crystal-clear quality using your phone’s camera. Auto-Detection: Automatically detects edges of the document and crops it for perfect scans. Multiple File Formats: Scan documents to PDF, JPG, PNG, and other formats. OCR (Optical Character Recognition): Extract text from scanned images for easy editing and sharing. Smart Enhancement: Auto-adjusts the brightness, contrast, and sharpness for perfect scans. Batch Scanning: Quickly scan multiple pages and combine them into one document. Easy Sharing: Share your documents via email, social media, or any other communication app with ease. How It Works: Open the app and point your phone’s camera at the document. iPixScan will automatically detect the document and crop it for you. Enhance the scan by adjusting settings or let the app do it automatically. Save the scan in your preferred format and share or store it. Why Choose iPixScan: Efficiency: Save time by turning your phone into a full-featured scanner. Portability: Carry all your important documents with you in digital form. User-Friendly: No complicated setup or usage – scan with just a few taps. Privacy & Security: iPixScan is designed with your privacy in mind, offering encrypted scans and secure cloud options.

Screenshots

Grindcalculator4 screens
i PixScan4 screens

Verdict

The call

The clearest difference is price: i PixScan at Free against Grindcalculator's $6.99. i PixScan also leads on iOS requirement (15.6 vs 26.0). Grindcalculator's advantage is ads (none vs shown) and update cadence (every 4 days vs every 3 weeks). On 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

i PixScan is free to download; Grindcalculator costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Grindcalculator ships an update every 4 days, i PixScan every 3 weeks. The most recent releases landed on September 19, 2026 and September 13, 2026 respectively.

Scorecard4 real differences · 6 level
Grindcalculator versus i PixScan: the parameters behind the verdict, then further details
ParameterGrindcalculatori PixScan
Price$6.99Free — better
Rating1.0 (1 ratings) — better—
Positive reviews84.6% of reviews—
Number of ratings1 — better—
Update frequencyEvery 4 days — betterEvery 3 weeks
AdsNo — betterYes
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.015.6 — better
Further details — not scored
Size9 MB7 MB
Age rating4+17+
DeveloperRoWo UGHardik Changela

In-app purchases

None

Grindcalculator

No in-app purchases

None

i PixScan

No in-app purchases

Questions

Is Grindcalculator free?
Grindcalculator costs $6.99, with no in-app purchases.
Is i PixScan free?
i PixScan is free to download, with no in-app purchases.
Do Grindcalculator or i PixScan have ads?
i PixScan shows ads; Grindcalculator does not.
Which is updated more often, Grindcalculator or i PixScan?
Grindcalculator ships an update every 4 days, and i PixScan every 3 weeks. Most recently, Grindcalculator was updated on September 19, 2026 and i PixScan on September 13, 2026.

Other comparisons