For force measurements, the ActivForce device is accurate within ± (1.4 lb + 5% of the applied force).
For range of motion measurements, the ActivForce device is accurate within a range of ±1° for angles measured from 0° to 33°, ±3% of the measured angle when > 33°.

For set-up and connection instructions, please check out the user guide.

The ActivForce system consists of a handheld dynamometer and inclinometer with an accompanying mobile/tablet app and web dashboard to help professionals perform strength and range and motion testing.

The system measures:

• Active and Passive Range of Motion (AROM & PROM)
• Peak Force
• Average Force
• Force over TimeForce / Weight Ratio
• Muscular Symmetry
• Neuromuscular Deficits

The ActivForce companion app displays and records real-time force and range of motion.

The ActivForce app can be downloaded from the Apple App Store or the Google Play Store.

The ActivForce 2 device (blue color) is compatible exclusively with the free ActivForce app, available in the Apple App Store and Google Play Store.
We no longer offer support for the original (orange color) ActivForce and Activ5 devices.
If you have further compatibility questions, please contact us by filling up this form.

ActivForce provides objective, data-driven results that remove the subjectivity of manual muscle testing. It combines a dynamometer and inclinometer in one compact, handheld device—replacing bulky, single-purpose tools—with digital tracking for consistent, repeatable results.

All items included in the ActivForce Kit aremoisture-resistant but not waterproof. It should never be submerged in water. Clean the device and accessories using disinfecting wipes or a 70% isopropyl alcohol and water solution.

The ActivForce system is optimized for practitioners and their clients. Our ActivElite system is designed especially for high-performance athletic training and professional sports environments. ActivElite provides more detailed testing and training prescription, and enables live training feedback. For more information on ActivElite, visit the website here.

The ActivForce kit comes with a variety of attachments to help tailor your testing, including:

• ActivForce 2 device
• Rounded pad attachment
• Arched pad attachment
• Silicone cover and foam insert
• Hand strap with an attached belt loop plate
• Long strap
• Immobilization belt with an attached belt loop plate

ActivForce is listed with the FDA as a Class II medical device.

The ActivForce app is currently available in English, Spanish, Italian, French, German, Dutch, Portuguese, Japanese, and Korean.

Yes. You can log in to your ActivForce account on multiple devices, and all test data and reports will automatically sync to your single account. Results are collated and viewable through your ActivForce dashboard using the same login used with the app.

For set-up and connection instructions, please check out the user guide.

Occasionally, you may find that your strength measurements do not seem to read as accurately. If you suspect that this is the case, go to Settings, My Profile, and select Calibrate Your Device.
Do not apply force before or during the calibration. This should stabilize measurement read-outs. If problems persist, please submit the form here for additional support.

The typical battery life of the ActivForce device is 6 to 12 months, depending on environmental conditions and frequency of use when performing test measurements. For visual reference on how to replace the battery, click here.

To remove an attachment, grab and twist to the left. To attach a different attachment, align the locking tabs on the accessory with the matching slots on the device, and twist it to the right. This locking mechanism is designed such that the attachments may be fixed at multiple angles. For more information on swapping out the attachments, view the Attachment Tutorial video.

Each test series performed with ActivForce can be customized and you may set certain default settings for strength tests. However, a group of tests can not be saved as a custom protocol at this time.

Yes, after completing a Strength or ROM test, you'll see an option to either keep your results or repeat the test by tapping "Redo Test." This allows you to retake the specific measurement you've just completed. You can also select ‘…’ in the test summary screen to pull up additional post-test options.

For more details and visual examples, please refer to our User Guide.

No, standard protocols aren’t currently included in the app.

For force measurements, the ActivForce device is accurate within ± (1.4 lb + 5% of the applied force).
For range of motion measurements, the ActivForce device is accurate within a range of ±1° for angles measured from 0° to 33°, ±3% of the measured angle when > 33°.

Attach the ActivForce 2 device to your client’s chosen limb, ensuring it’s placed over a single joint (not crossing two). Then perform the test as usual in the ActivForce app. For detailed instructions, view our Tutorial video here.

For examples and educational resources, visit our tutorial page here.

We also host webinars with additional insights from professionals who use ActivForce daily in their practice. For more information on upcoming events, click here.

To view a client's force-to-weight ratio:

1. Save the report in the app
2. Open the report on the web dashboard
3. Tap on "Add/Edit Subject Details"
4. Input the client's weight
5. The report will automatically update to display the Force to Weight ratio

Use the provided straps, belts, and belt loop plate to anchor the device or secure it against fixed objects. Place the device perpendicular and avoid applying off-axis forces.

In a make test, the subject exerts maximal force against a fixed object (the practitioner resists).

In a break test, the practitioner overcomes the subject’s force to “break” the contraction.

The make test is preferred for more accurate results and safety.

ActivForce supports make tests (the user pushes maximally against the device). Break tests are not recommended for use with ActivForce

The ActivForce app captures 40 samples per second, providing precise, real-time measurement of force during every test.

ActivForce supports Newtons, pounds, and kilogram force units. You can switch unit types inSettings onboth the dashboard and app.

Currently, ActivForce does not integrate directly with third-party health apps. However, the ActivForce dashboard includes a “Copy Data” feature that generates a text-only, customizable report, which can be pasted into your EHR system or other software. To access this, select a report and click “Copy Data” in the top right corner.

To generate a progress report, go to the Dashboard homepage and select “Track Progress.” Choose the subject you’d like to view, and all tests will be listed automatically. For accurate reports, ensure your subject identifiers are consistent and correctly entered when saving tests in the app.

You can sign up for an account through the ActivForce app. Please check out the user guide for a more detailed walkthrough.

To change an account's registered email address, please contact us by filling up this form.

Client data is not stored within the ActivForce app. However, you can save your test results at the end of the test workflow and access them any time on the ActivForce dashboard at https://activforce.activbody.com/.

Client data is not stored within the ActivForce app. However, you can save your test results at the end of the test workflow and access them any time on the ActivForce dashboard at https://activforce.activbody.com/.

If automatic updates are enabled on your device, the ActivForce app will update automatically. You can also visit the App Store or Google Play Store to check for the latest version. We regularly share app and dashboard updates in our Dev Diaries on the News & Updates page.

If you need replacement parts or accessories, please fill up this form.

Please include your shipping address and telephone number in your inquiry.

Currently, we do not offer international shipping. Orders from our official website can only be shipped within the US. If you’re outside the US, you can find the full list of our overseas distributors here.

We accept returns up to 30 days after delivery and we will refund the full order amount minus the shipping costs for the return.

Within the United States: we offer free standard shipping that takes approximately 3-7 business days for delivery.

Outside of the United States: orders from our official website can only be shipped within the US. If you’re outside the US, you can find the full list of our overseas distributors here.

Please note: Shipping times are approximate and are calculated according to the date and time at which your order leaves the distribution center, not from the date you placed your order.

Upon shipment, you will receive an email notification containing your parcel’s tracking number. If you have not received this notification or cannot locate it, please contact Support by filling up this form. Please include your order number and/or email address you used when you placed the order in your inquiry.

If you are in the United States; depending on your chosen shipping method, your parcel may be delivered by UPS, FedEx, or the United States Postal Service.

We do offer academic pricing to educators and students based in the U.S. through our University Partnership Program. For more details, please contact us using this form.

We address volume orders on a per-case basis. Please submit your inquiry by filling out this form.

We welcome research collaborations. Please contact us with your study proposal using this form.

If you are a brick-and-mortar or online retailer interested in distributing ActivForce, please contact us using this form.

We have multiple distributors across Europe, the United Kingdom, Australia, New Zealand, Brazil, and the United States. If you are unsure whether ActivForce is distributed in your country, please contact Support by filling out this form.