# BLACKSLATE7 vs Stop Calculator

The clearest difference is review sentiment: Stop Calculator at 100% against BLACKSLATE7's 20%. Stop Calculator also leads on rating (5.0 vs 2.7) and update cadence (every 2 days vs every 3 months). BLACKSLATE7's advantage is price (Free vs $0.99). On ratings volume, ads, in-app purchases and device support there is nothing between them.

BLACKSLATE7 is free to download; Stop Calculator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Stop Calculator holds the better App Store score, 5.0 against 2.7. Both are backed by a comparable volume of ratings — 6 and 4 respectively. Written reviews point the same way: 20% of BLACKSLATE7's written reviews are positive against 100% of Stop Calculator's.

BLACKSLATE7 ships an update every 3 months, Stop Calculator every 2 days. The most recent releases landed on June 11, 2026 and August 8, 2026 respectively.

## The numbers

| Metric | BLACKSLATE7 | Stop Calculator |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [2.7 (6 ratings)](https://appshunter.io/ios/app/blackslate7/id6443485693/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/stop-calculator/id6720706774/reviews)** |
| Number of ratings | **6** | 4 |
| Positive reviews | 20.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 days** |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#155** |
| Size | 19 MB | 1 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Lummico Sp. z o.o.](https://appshunter.io/developer/1645077423) | [eric Hernandez](https://appshunter.io/developer/875120891) |

## What reviewers say

### BLACKSLATE7

[App page](https://appshunter.io/ios/app/blackslate7/id6443485693)

This app transforms your smartphone into a programmable clapperboard for film and TV production. Easily load custom images or pre-set templates onto a compatible physical slate using NFC technology. Adjust image contrast and create grayscale effects for optimal visual output.

**Highlights:** Program images onto physical slate via NFC, Load pre-set SLATE templates, Create custom clapperboard images, Crop, scale, and rotate images, Adjust black/white threshold for contrast, Unique dithering control for grayscale simulation

**Features:** macOS Compatibility

**In-app purchases:** none


### Stop Calculator

[App page](https://appshunter.io/ios/app/stop-calculator/id6720706774)

**Currently charting:** #155 Top Paid · Photo & Video (US App Store)

This tool helps filmmakers quickly compare exposure settings between two cameras. It calculates precise stop differences in real-time, ensuring your shots are perfectly exposed and matched across different setups. Simplify your workflow and eliminate guesswork.

**Highlights:** Compare ISO, t-stop, shutter angle, and FPS, Real-time stop difference calculation, Intuitive interface for filmmakers, Exposure feedback for underexposed/overexposed shots

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

**In-app purchases:** none


## Frequently asked questions

### Is BLACKSLATE7 free?

BLACKSLATE7 is free to download, with no in-app purchases.

### Is Stop Calculator free?

Stop Calculator costs $0.99, with no in-app purchases.

### Which has better reviews, BLACKSLATE7 or Stop Calculator?

Stop Calculator is rated higher. BLACKSLATE7 averages 2.7 out of 5 from 6 ratings, while Stop Calculator averages 5.0 from 4 ratings.

### Do BLACKSLATE7 or Stop Calculator have ads?

Neither BLACKSLATE7 nor Stop Calculator shows ads.

### Which is updated more often, BLACKSLATE7 or Stop Calculator?

BLACKSLATE7 ships an update every 3 months, and Stop Calculator every 2 days. Most recently, BLACKSLATE7 was updated on June 11, 2026 and Stop Calculator on August 8, 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.*