Foc.us V3 / Go Flow
Widest waveform/protocol flexibility on the consumer market; favored by DIY community since 2012
NOT CLEARED
No FDA clearance, registration, or CE marking found.
Key facts at a glance.
- Founded
- 2012
- Headquarters
- Hong Kong / UK
- Price range
- $188–$399
The real price over three years.
Total cost of ownership · 3yr
| Hardwareone-time | $188 |
| 3-year total | $188 |
What the device does.
- + Multi-modality: tDCS, tACS, tRNS, tPCS, sotDCS, tRCS (V3 exclusive)
- + Up to 4 mA output (Go Flow)
- + 3D head-model electrode placement guidance
- + Optional EEG integration
- + Programmable protocols
- + Bluetooth app control (V3)
The trade-offs.
- + **Widest waveform / protocol flexibility on the consumer market**
- + **Favored by DIY community since 2012** — established biohacker positioning
- + 2012-founded Hong Kong / UK with multi-year track record
- + $188-399 mid-tier pricing
- + Power-user customization beyond fixed-current alternatives
- − **Not FDA-cleared** for any indication
- − Power-user complexity steep learning curve
- − DIY community positioning vs mainstream consumer accessibility
- − Smaller brand awareness vs Caputron / Flow Neuroscience
Advanced biohackers, DIY tDCS community, gamers, cognitive enhancement enthusiasts
The long read.
§ Hands-on instrument testing pending. Based on published specifications and third-party data.
Overview
Foc.us V3 / Go Flow is the widest-waveform-protocol-flexibility tDCS specialist for DIY community — founded 2012 in Hong Kong / UK, with structural value claim built on widest waveform / protocol flexibility on consumer market + favored by DIY community since 2012 + multi-year established positioning. For power-users wanting maximum customization beyond fixed-current alternatives, Foc.us V3 is structurally distinctive.
The structural editorial caveats: not FDA-cleared, power-user complexity steep learning curve, DIY community positioning vs mainstream accessibility, and smaller brand awareness vs Caputron / Flow Neuroscience.
When Foc.us V3 Makes Sense
Strong fit: Power-users wanting widest waveform / protocol customization; DIY biohacker community positioning alignment; multi-year established DIY-tDCS market presence.
Weaker fit: FDA-PMA depression treatment (Flow Neuroscience FL-100); off-label FDA-cleared chassis (Caputron ActivaDose); EU prescribed depression (Sooma); idiot-proof entry (TheBrainDriver V2.1).
3-Year Cost of Ownership
| Use case | Cost |
|---|---|
| Foc.us V3 / Go Flow | ~$188-399 |
Compare: TheBrainDriver V2.1 ($127-150 idiot-proof), Caputron ActivaDose ($249-449 off-label cleared), Flow Neuroscience FL-100 ($400+ PMA), Brain Premier ($99-175).
Verdict: Recommended
Foc.us V3 / Go Flow earns a recommended verdict on widest waveform / protocol flexibility on consumer market, DIY community-favored positioning since 2012, multi-year established Hong Kong / UK manufacturing, and $188-399 mid-tier pricing — balanced against not-FDA-cleared positioning, power-user complexity learning curve, DIY positioning vs mainstream, and smaller brand awareness.
For power-users wanting maximum waveform / protocol customization + DIY community alignment, structurally distinctive. For FDA clearances, mainstream accessibility, or simpler interface, alternatives are better matched.
Changelog
- 2026-05-07: Initial review published based on Foc.us V3 / Go Flow published specifications.
What we'll measure on the bench.
- Protocol
- Multimeter at electrodes (current source verification)
- Primary metric
- Output current at each preset (mA)
- Pass threshold
- within ±10% of selected current
- Session shape
- 3 measurements per preset × all presets
§ Bench session pending. Measured values will replace this panel as the protocol completes — see Plate VI · Methodology for the full testing rulebook.