ActivForce 2 vs. Hoggan MicroFET3

Choosing a Handheld Dynamometer and ROM Device for Clinical Practice

Handheld dynamometry has replaced manual muscle testing (MMT) as the objective standard for strength assessment in physical therapy, orthopedics, and sports medicine — MMT's ordinal 0-5 grading scale is too coarse to detect the strength changes that matter clinically, especially in mid-to-high function patients. Two devices dominate the clinic-grade market: the ActivForce 2 (ActivBody) and the Hoggan MicroFET3. Both combine a force dynamometer with a built-in inclinometer for range-of-motion (ROM) testing, but they take different approaches to accuracy, workflow, and cost.

Force Testing Capability

The ActivForce 2 measures a wider working range — up to 200 lb (90 kg), with a 250 lb max load — versus the MicroFET3's 0–150 lb range. Its accuracy is rated at ±(1.4 lb + 5% of the applied force), a spec that scales with load. The MicroFET3 counters with a flat ±1% of reading accuracy and dual threshold settings (a 0.8 lb low threshold for fine testing, a 3 lb high threshold for gross strength), letting clinicians dial in sensitivity by patient population. For raw dynamic range, ActivForce 2 has the edge; for stated precision consistency across the range, MicroFET3's flat percentage spec is easier to reason about clinically.

Figure 1. Working force range and maximum load capacity, in pounds.

Range of Motion Testing

Both devices double as inclinometers, but ActivForce 2's 0–360° range covers full rotational movement in one placement, where the MicroFET3 is limited to 0–180°. Stated ROM accuracy is comparable (±1° for MicroFET3; the greater of ±3% or ±1° for ActivForce 2), so day-to-day reliability should feel similar in the exam room, but ActivForce 2 needs fewer repositions for movements that cross 180°.

Figure 2. Maximum range-of-motion measurement, in degrees of rotation.

Connectivity, Software, and Workflow

This is where the two devices diverge most. The MicroFET3 is a standalone unit with an onboard LCD — it displays peak force, elapsed time, and degrees with no phone, tablet, or subscription required. Pairing it to Hoggan's optional MicroFET or FET Data Collection software (each an added $662) unlocks trend reports and CSV export, but the device itself works independently out of the box. The ActivForce 2 is app-dependent: it has no onboard display and connects via Bluetooth to a free iOS/Android app with a library of 500+ guided tests, live force visualization, and cloud-based progress tracking. That app is included at no extra cost, but it does mean a phone or tablet is part of every test.

Physical Design and Portability

ActivForce 2 is dramatically lighter and more pocketable — 4.8 oz versus roughly 4 lb for the MicroFET3 kit — and runs on a single AAA battery rather than a rechargeable lithium-ion cell. For clinicians moving between treatment rooms or doing home visits, that difference is noticeable by the end of a shift.

Figure 3. Device weight — ActivForce 2 (unit only) vs. MicroFET3 (unit + kit case, as shipped).

Price and Value

At $500, ActivForce 2 undercuts the MicroFET3's $1,844 base price by a wide margin, and its core app is bundled in at no extra cost. Adding ActivForce 2's optional reporting software brings its total to $1,162 — still well below the MicroFET3's base price, and that's before factoring in any of the MicroFET3's own optional software packages, which run an additional $662 each.

Figure 4. List price comparison — base unit vs. cost to reach comparable digital reporting.

Bottom Line

Choose the ActivForce 2 for a lightweight, app-driven system with a large built-in test library, full 360° ROM capability, and a lower up-front cost — ideal for clinics already comfortable pairing devices to a phone or tablet. Choose the MicroFET3 for a standalone, no-app-required device with tighter relative force accuracy, dual-threshold sensitivity, and an established track record in research and clinical settings — a better fit where independence from mobile hardware, or software-free bedside use, is a priority.

Sources: activforce.com/products/activforce-2 and hogganscientific.com/product/microfet3-digital-dynamometer-and-inclinometer (manufacturer specification pages, accessed July 2026). Specifications and pricing are subject to change — verify current figures with each manufacturer before purchasing.