# Focus Chart vs ARRI ECS

The clearest difference is iOS requirement: Focus Chart at 12.0 against ARRI ECS's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Focus Chart ships an update every 16 months, ARRI ECS every 14 months. The most recent releases landed on October 4, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Focus Chart | ARRI ECS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (9 ratings)](https://appshunter.io/ios/app/focus-chart/id808174720/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 14 months** |
| Monetization | Free | — |
| Size | 44 MB | 23 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cadrage GmbH](https://appshunter.io/developer/793232743) | [ARRI Group](https://appshunter.io/developer/733009342) |

## What reviewers say

### Focus Chart

[App page](https://appshunter.io/ios/app/focus-chart/id808174720)

This tool displays focus charts with a siemens star to assist with camera lens adjustments and testing. It keeps your device awake during critical focus calibration, offering two distinct charts for easy switching.

**Highlights:** Two focus charts with siemens star, Prevents device standby, Back focus adjustment, Lens testing, Swipe left/right for chart switching

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

**In-app purchases:** none


### ARRI ECS

[App page](https://appshunter.io/ios/app/arri-ecs/id1555674483)

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

**In-app purchases:** none


## Frequently asked questions

### Is Focus Chart free?

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

### Is ARRI ECS free?

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

### Do Focus Chart or ARRI ECS have ads?

Neither Focus Chart nor ARRI ECS shows ads.

### Which is updated more often, Focus Chart or ARRI ECS?

Focus Chart ships an update every 16 months, and ARRI ECS every 14 months. Most recently, Focus Chart was updated on October 4, 2026 and ARRI ECS on September 19, 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.*