Change Release Notes
loading and saving project is much faster now
Improved speed and memory usage of loading and saving files, both locally and on the cloud
Significant cloud saving performance improvements by compressing the upload
Large projects (~ 100mb) do not produce "out of system memory"
*Note: I've been able to test unicode text for foreign languages saving/loading. And while my tests do work, please verify your project load and saves correctly from the cloud and local if you have foreign language/characters.
ARC Downloads
ARC
FREE- 1 third-party plugin skill per project
- Trial cloud services
- Personal, DIY & education use
- Updated every 6–12 months
ARC
PRO- Use on 2+ PCs simultaneously
- Unlimited robot skills
- Cloud backup & revision history
- Weekly features & bug fixes
- Business use permitted
ARC
RUNTIME- Load & run any ARC project
- Read-only mode
- Unlimited robot skills
- Includes early access fixes & features
- Minimum requirements: Windows 10 or higher, 2 GB RAM, 500 MB free disk space.
- Recommended: Windows 10 or higher, 8 GB RAM, 1 GB free disk space.
- Prices are in USD.
- More about each edition: Download & install guide.
- Latest changes: Release notes.
Compare Editions
| Feature |
ARC
FREE
|
ARC
PRO
|
|---|---|---|
| Get ARC Free | View Plans | |
| Usage | Personal · DIY · Education | Personal · DIY · Education · Business |
| Early access to new features & fixes | — | ✓ |
| Simultaneous microcontroller connections * | 1 | 255 |
| Robot skills * | 20 | Unlimited |
| Skill Store plugins * | 1 | Unlimited |
| Cognitive services usage ** | 10 / day | 6,000 / day |
| Auto-positions gait actions * | 40 | Unlimited |
| Speech recognition phrases * | 10 | Unlimited |
| Camera devices * | 1 | Unlimited |
| Vision resolution | max 320×240 | Unlimited |
| Interface builder * | 2 | Unlimited |
| Cloud project size | — | 128 MB |
| Cloud project revision history | — | ✓ |
| Create Exosphere requests | — | 50 / month |
| Exosphere API access | — | Contact Us |
| Volume license discounts | — | Contact Us |
| Get ARC Free | View Plans |
* Per robot project
** 1,000 per cognitive type: vision recognition, speech recognition, face detection, sentiment, text recognition, emotion detection, azure text to speech
Upgrade to ARC Pro
Your robot can be more than a simple automated machine with the power of ARC Pro!

Ok, So how do I download an update without having to re-subscribe all over again? I already paid for the 1 year.
You don’t ever have to resubscribe - download the update and install it like you always have.
Hi @RoboHappy, I just downloaded the new upgraded version and had no problems. I simply clicked the "Get ARC" link above and it took me to the ARC page. You should see a baby blue colored box near the top that should have the title "You already have an ARC Pro subscription license" below that click on the link "Go to Downloads to isntall or upgrade ARC". Here are the direct link:
https://synthiam.com/Products/ARC#download-free
BTY @DJ, the word "Install" is spelled wrong on the target page on the "Get ARC" Page here: https://synthiam.com/Products/ARC . There it's spelled "isntall". I'm the last one to be pointing out spelling errors. LOL.
Woooo good find Dave. Good thing only paying customers see that spelling mistake
LOL. something small like that is not a big deal. I just know how picky you are about the details and thought you may like to know. I've been misspelling all my life. Thank the electronic gods for auto spell check!
BWY, I love the new speed enhancements. I see a noticeable speed difference when starting and shutting down a project.
Ok, I tried that, and all it does is take me to the ARC pricing age first.
I tried again. It still takes me to the ARC pricing page first, shows no indication that I subscribed, even though I have done so.
RoboHappy, sounds like you're continually pressing the "View Plans" button. If you are a pro member, you do not need to "View plans" because you already have one. The only reason you would "view plans" is if you are attempting to modify your existing subscription plan. You can add additional PCs to the subscription plan if you wish, but that's not what i believe you are wanting to do.
If you are attempting to upgrade ARC, then download it and install it from the download list. Choose the Early Access as it's the best for pro users to receive the latest updates.