Focus Chart vs ARRI ECS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Focus Chart
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.
- Two focus charts with siemens star
- Prevents device standby
- Back focus adjustment
- Lens testing
- Swipe left/right for chart switching
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This app displays two different focus charts with a siemens star. It prevents the phone from going to stand-by while you're adjusting the back focus of your camera or testing your lenses. Swipe left and right two switch between the two charts. It's a simple yet effective tool for cinematographers, photographers and camera assistants.
ARRI ECS
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The “ECS Sync” iPhone app functions as a direct communication platform between ARRI and users of ARRI’s Electronic Control System (ECS). Adaptable to any camera and any lens, ARRI ECS tools include wireless hand units and digital controllers, intelligent lens motors, and distance measurers. With the ECS Sync app, users can receive up-to-the-minute software updates, news, and answers to frequently asked questions relevant to these products. In addition, the ECS Sync app enables Bluetooth file sharing between ECS devices and the app via the new Hi-5 hand unit, without the need of a bulky laptop on set. Software versions can be synchronized, and transferred from the app to the connected devices. Lens files and user settings can be archived in the app, or forwarded on, including to the user’s Google Drive or Drop Box. Lens files can also be displayed graphically, contributing to the app’s usefulness as a portable and intuitive filmmaking tool. Features: • Save and load lens tables and user setup files to/from the Hi-5 hand unit via Bluetooth • Create a personalized lens data archive in the ECS Sync app • Update the Hi-5 hand unit and connected LBUS devices via the app • Get the latest news about ARRI ECS products • Distribute lens tables and user setup files from the app via email, WhatsApp, Dropbox, Google Drive and more
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Focus Chart | ARRI ECS |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (9 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 9 — better | — |
| Update frequency | Every 16 months | Every 14 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 44 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Cadrage GmbH | ARRI Group |
In-app purchases
Focus Chart
No in-app purchases
ARRI ECS
No in-app purchases









