# Letus Helix vs Stop Calculator

The clearest difference is price: Letus Helix at Free against Stop Calculator's $0.99. Letus Helix also leads on iOS requirement (11.0 vs 15.6). Stop Calculator's advantage is rating (5.0 vs 3.7) and update cadence (every 2 days vs every 4 months). On ratings volume, ads, in-app purchases and device support there is nothing between them.

Letus Helix 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 3.7. Both are backed by a comparable volume of ratings — 3 and 4 respectively. Written reviews point the same way: 80% of Letus Helix's written reviews are positive against 100% of Stop Calculator's.

Letus Helix ships an update every 4 months, Stop Calculator every 2 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Letus Helix | Stop Calculator |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/letus-helix/id967348624/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/stop-calculator/id6720706774/reviews)** |
| Number of ratings | 3 | **4** |
| Positive reviews | 80.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 days** |
| Monetization | **Free** | Paid |
| Size | 21 MB | 1 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ken Lawler](https://appshunter.io/developer/967348623) | [eric Hernandez](https://appshunter.io/developer/875120891) |

## What reviewers say

### Letus Helix

[App page](https://appshunter.io/ios/app/letus-helix/id967348624)

This app provides a streamlined interface for adjusting settings on various Letus Helix gimbal models. It simplifies configuration by removing less frequently used options found in desktop software, offering additional user assistance tools for easier operation.

**Highlights:** Intuitive settings adjustment, Simplified configuration, User assistance tools, Wi-Fi connectivity, Support for multiple Helix models

**In-app purchases:** none


### Stop Calculator

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

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 Letus Helix free?

Letus Helix 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, Letus Helix or Stop Calculator?

Stop Calculator is rated higher. Letus Helix averages 3.7 out of 5 from 3 ratings, while Stop Calculator averages 5.0 from 4 ratings.

### Do Letus Helix or Stop Calculator have ads?

Neither Letus Helix nor Stop Calculator shows ads.

### Which is updated more often, Letus Helix or Stop Calculator?

Letus Helix ships an update every 4 months, and Stop Calculator every 2 days. Most recently, Letus Helix was updated on October 24, 2026 and Stop Calculator on October 24, 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.*