bilateralstimulation.io is a browser-based EMDR platform with USB buzzers at $129/set and a $15/mo subscription. TheraJoy is a native iPhone app using Joy-Con haptics — wireless, no laptop required, $79/yr.
bilateralstimulation.io is a browser-based platform that delivers visual, audio, and tactile bilateral stimulation for EMDR. The free tier covers visual and audio BLS. For tactile stimulation, they sell USB-connected buzzers at $129/set. The Pro plan is $15/mo ($180/yr) and unlocks remote session broadcasting, where a therapist can control a client's BLS from a separate browser window.
It's a capable platform — especially for therapists who prefer visual or audio BLS, or who primarily work at a desk. The limitations show when you need mobility or native haptic quality.
Browser-based BLS tools run in whatever browser tab the therapist or client has open. For visual and audio BLS, that's fine. For tactile BLS, it means routing haptic signals through a browser to USB hardware — introducing latency, driver dependencies, and a laptop requirement. USB buzzers only work when physically connected to a computer.
TheraJoy is a native iOS app. Joy-Con controllers pair directly to iPhone via Bluetooth. No browser, no laptop, no USB cables. The app runs locally on the device, and haptic timing is handled at the OS level — precise, low-latency, consistent.
| Feature | bilateralstimulation.io | TheraJoy |
|---|---|---|
| Platform | Web (browser) | Native iOS app |
| Tactile hardware needed | $129 USB buzzers | Joy-Con (~$80, or already owned) |
| Annual software cost (pro) | $180/yr | $79/yr |
| Total first-year cost (tactile) | $309 ($129 + $180) | $79 + Joy-Con if needed |
| Works on iPhone (no laptop) | ✗ USB requires laptop | ✓ iPhone-native |
| Wireless | ✗ USB tethered | ✓ Bluetooth Joy-Con |
| Therapist-led remote sessions | ✓ | ✓ |
| Visual BLS | ✓ | ✗ Tactile only |
| Audio BLS | ✓ | ✗ Tactile only |
| Free trial | Free tier (visual/audio only) | ✓ Full 7-day trial |
| Client joins free | Unclear | ✓ Always free |
Visual and audio BLS. TheraJoy is tactile-only. If your protocol relies on visual (light bar) or audio (tones, music) bilateral stimulation — or if you want to switch modalities within a session — bilateralstimulation.io has options TheraJoy doesn't offer.
Works without any extra hardware (visual/audio). For therapists who don't need tactile BLS, the free tier covers a lot of ground with just a browser.
Haptic quality. Joy-Con controllers use linear resonance actuators — the same precision haptic hardware in iPhone's Taptic Engine. USB buzzers typically use basic vibration motors (eccentric rotating mass). The difference in feel is significant: LRA haptics produce clean, distinct pulses; ERM motors produce a blurry buzz. For tactile BLS specifically, the quality difference matters.
Fully mobile. A session with TheraJoy can happen anywhere — couch, floor, waiting room, walking therapy. No laptop required. The entire session runs from an iPhone in the therapist's pocket.
Lower total cost. At $79/yr with no mandatory hardware purchase (if clients own Joy-Cons), the entry cost is significantly lower. Even adding a $80 Joy-Con pair, first-year cost is $159 vs. $309 for bilateralstimulation.io's tactile setup.
Free 7-day trial with full access. No credit card needed. Joy-Con bilateral stimulation on iPhone.
Download on the App Store