# Grindcalculator — Grindcalculator for all brands

> Sharpening calculator for precise knife sharpening angles and consistent results. (iPhone/iPad app by RoWo UG.)

- Source: https://appshunter.io/ios/app/grindcalculator/id1660469778 (this page in markdown: same URL + `.md`)
- Developer: [RoWo UG](https://appshunter.io/developer/1660469780)
- Category: Productivity, Utilities
- Price: $6.99
- Rating: 1.00/5 from 1 App Store ratings · 13 written reviews indexed
- Age rating: 4+
- Requires: iOS 26.0 · 9 MB
- Languages: German (Germany), Danish, American English, French (France), Italian, Swedish, European Spanish, Czech
- Released: 2022-12-23
- Data updated: 2026-08-14
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/grindcalculator/id1660469778/reviews.md

## What is Grindcalculator?

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.

## Key features

- Precise angle calculation
- Eliminates manual marking
- Save custom angles
- Save grinding wheel dimensions
- Supports all grinder brands
- Offline functionality

## Recent user reviews (10 of 13)

All indexed reviews: https://appshunter.io/ios/app/grindcalculator/id1660469778/reviews.md

### 4/5 — Looks like a really useful app

*2025-11-20*

This app looks like just what I am looking for. However the help area of the app is not working for me. Please could the developer send over the guide to help me ensure I get the best out of this software.

### 5/5 — Perfekt

*2025-11-02*

Super App und die Funktionen alle Messer und Steine zu speichern funktioniert super. Die Historie der Messer kann auch hinterlegt werden

### 1/5 — ZERO APP SUPPORT

*2024-09-14, version 4.1.1*

This app is not self explanatory and “app help” is not longer available. 
Please refund $9.99

Thank you

### 5/5 — Tolle App und wahnsinnig schneller Support

*2024-09-05*

Die App bietet alle Einstellhilfen für das Schleifen an Maschinen mit runden Schleifscheiben (Tormek & Co.). 
Ich persönlich finde vor allem die Möglichkeit der individuellen Einstellungen sehr wertvoll. 
So kann man zunächst Werkzeuggruppen definieren (Messer, Schnitzmesser, Drechselwerkzeuge). 
Dann kann innerhalb dieser Gruppe jedes einzelne Werkzeug mit den notwendigen Parametern (Schleifwinkel, Schleifrichtung, Werkzeughalter, Notizen) erfasst werden, so dass jedes Werkzeug reproduzierbar geschärft werden kann. 
Der Entwickler reagiert sehr schnell auf Fragen und Anregungen.
Beispielhaft!

### 4/5 — Wc200

*2024-08-04*

Hat jemand die Werte für die record wc200 weil ich die bei den Voreinstellungen nicht finde. Wäre super. Danke

### 5/5 — App für Tormek T8

*2024-05-27*

Funktioniert sehr gut, endlich ein reproduzierbares Ergebnis.
Mir ist schleierhaft warum Tormek so etwas nicht anbietet, aber umso besser für diesen Entwickler 👍

### 4/5 — Tormek T4 Frontbar

*2024-01-28*

Guten Abend,

können Sie noch die Werte für die T4 Frontbar durchgeben?

besten Dank und Grüße 

Michael

### 1/5 — Zugriff nur auf die Berechnung ‘Top’

*2023-08-21*

Anders als in der Beschreibung kann ich nicht die Berechnungen für’Front’ bzw. ‘Frontbase’ sehen. Damit wird die App für mich wertlos.

**Developer response:** Hallo Herr Fiedler,
vermutlich liegt es daran, dass sie bei dem Gerät nicht den Haken bei "Frontbase vorhanden" bzw. "Front" vorhanden gesetzt haben. Denn so ein Fehler ist uns nicht bekannt.

Gerne können Sie mit uns Kontakt aufnehmen, damit wir schauen wo das Problem möglicherweise liegt.

### 5/5 — Top App für meine T4

*2023-05-17*

Ich verwende die App in Verbindung mit meiner T4 incl. Frontbase. Die exakte Messung der horizontalen und vertikalen Abstände für alle Aufnahmen fand ich persönlich in Sachen Genauigkeit etwas schwierig, hat aber so weit ich es einschätzen kann dann doch funktioniert.
Die App selbst ist Top. Funktionell, verständlich leicht zu verwenden und schön im Design.
Fragen an den Entwickler wurden prompt und kompetent beantwortet. Preis Leistung passt.

**Developer response:** Hallo, 

vielen Dank für das positive Feedback. Und wir sind wie immer froh, wenn wir Helfen konnten. 

Viele Grüße aus Passau

### 5/5 — Wow !!! And responsive developper

*2023-03-19, version 2.8*

Never got such an impact on an App like this. Just emailed the developper as I wanted to be able to have 0.1 increments in the addon angle versus the 0.5, as deburring command such little changes. He accepted, modified and published within 24 hours. Worth every penny and all setting and measurments stored without having to relog into a website. Smartphones are the best while in the shop and dust everywhere versus computers. Version 2.8 makes the difference !
I have other wishes on my list to make it even better ! ;)

## Frequently asked questions about Grindcalculator

### What is Grindcalculator used for?

Grindcalculator is a productivity tool designed to help users achieve precise sharpening angles for knives and other tools. It simplifies the process by calculating the correct angles, removing the need for manual marking and complex adjustments.

### How does Grindcalculator simplify sharpening?

It eliminates the need for manual phase marking and complicated angle gauge application. By inputting basic dimensions, the app calculates the correct toolbar height for a consistently good sharpening result.

### Can Grindcalculator be used with different brands of grinders?

Yes, Grindcalculator is designed to work with virtually any grinding machine from all manufacturers. It supports various grinding wheels and can accommodate custom structures.

### Does Grindcalculator require an internet connection?

No, the app works anytime, anywhere, even without an active internet connection. An internet connection is only required for iCloud synchronization between devices.

### How much does Grindcalculator cost?

Grindcalculator is a paid application priced at $6.99. This one-time purchase grants access to all its features.

### What devices is Grindcalculator available on?

Grindcalculator is available for both iPhone and iPad. Users can utilize family sharing to allow multiple family members access.

### How often is Grindcalculator updated?

The latest version is 5.5, last updated on February 26, 2026. While specific update frequency is not detailed, this indicates ongoing development and support.

### What is the user sentiment for Grindcalculator?

Based on the provided data, Grindcalculator has a rating of 1.0 stars from 1 rating. This single rating suggests limited user feedback is currently available.

## Version history (last 5 releases)

### 5.5 — 2026-02-26

iOS-26-Ready

### 5.4 — 2025-04-01

Update for iOS 18.4

### 4.1.1 — 2024-09-05

In the calculation, if a tool holder is stored, it will be displayed.

### 4.0.2 — 2023-05-24

Bugfix Text

### 4.0.1 — 2023-05-15

Code-Optimizations

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## More apps by RoWo UG

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All apps by RoWo UG: https://appshunter.io/developer/1660469780

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-14.*