# Grindcalculator vs Ottertools FS

The clearest difference is price: Ottertools FS at Free against Grindcalculator's $6.99. Ottertools FS also leads on iOS requirement (13.0 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

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

## The numbers

| Metric | Grindcalculator | Ottertools FS |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/grindcalculator/id1660469778/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 84.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 days | — |
| Monetization | Paid | — |
| Size | 9 MB | 6 MB |
| Requires iOS | 26.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [RoWo UG](https://appshunter.io/developer/1660469780) | [Philipp Jung](https://appshunter.io/developer/1665649437) |

## What reviewers say

### Grindcalculator

[App page](https://appshunter.io/ios/app/grindcalculator/id1660469778)

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

**In-app purchases:** none


### Ottertools FS

[App page](https://appshunter.io/ios/app/ottertools-fs/id1665649435)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Grindcalculator free?

Grindcalculator costs $6.99, with no in-app purchases.

### Is Ottertools FS free?

Ottertools FS is free to download, with no in-app purchases.

### Do Grindcalculator or Ottertools FS have ads?

Neither Grindcalculator nor Ottertools FS shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*