# Grindcalculator vs StampCam Watermark Camera

The clearest difference is price: StampCam Watermark Camera at Free against Grindcalculator's $6.99. StampCam Watermark Camera also leads on rating (4.7 vs 1.0) and review sentiment (100% vs 85%). Grindcalculator's advantage is update cadence (every 4 days vs every 2 weeks). On ads, in-app purchases and device support there is nothing between them.

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

StampCam Watermark Camera holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: StampCam Watermark Camera has 6 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 85% of Grindcalculator's written reviews are positive against 100% of StampCam Watermark Camera's.

Grindcalculator ships an update every 4 days, StampCam Watermark Camera every 2 weeks. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Grindcalculator | StampCam Watermark Camera |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/grindcalculator/id1660469778/reviews) | **[4.7 (6 ratings)](https://appshunter.io/ios/app/stampcam-watermark-camera/id6771804548/reviews)** |
| Number of ratings | 1 | **6** |
| Positive reviews | 84.6% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Monetization | Paid | **Free** |
| Size | 9 MB | 10 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RoWo UG](https://appshunter.io/developer/1660469780) | [辉全 钟](https://appshunter.io/developer/6771585530) |

## 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


### StampCam Watermark Camera

[App page](https://appshunter.io/ios/app/stampcam-watermark-camera/id6771804548)

Easily add GPS timestamps, maps, weather, and custom logos to your photos and videos. Create branded collages, PDFs, or email-ready reports from multiple captures for professional documentation.

**Highlights:** GPS timestamp and location overlay, Weather and device information, Customizable watermark templates, Brand logo integration, Create collages, PDFs, and ZIP reports, Email-ready work reports

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Grindcalculator free?

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

### Is StampCam Watermark Camera free?

StampCam Watermark Camera is free to download, with no in-app purchases.

### Which has better reviews, Grindcalculator or StampCam Watermark Camera?

StampCam Watermark Camera is rated higher. Grindcalculator averages 1.0 out of 5 from 1 ratings, while StampCam Watermark Camera averages 4.7 from 6 ratings.

### Do Grindcalculator or StampCam Watermark Camera have ads?

Neither Grindcalculator nor StampCam Watermark Camera shows ads.

### Which is updated more often, Grindcalculator or StampCam Watermark Camera?

Grindcalculator ships an update every 4 days, and StampCam Watermark Camera every 2 weeks. Most recently, Grindcalculator was updated on October 24, 2026 and StampCam Watermark Camera on October 31, 2026.

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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.*