Featured β app bundle kits
Start with a kit for your app
Devices near MSRP Β· blended margin is the setup & data-integration service- UMIK-1 mic / dB$139
- Osmo Action 5 Pro$369
- HR armband (opt.)$119
οΌ Setup & Data-Integration included
Kit from $508
- OBSBOT Tail Air follow-cam$569
- Child HR armband$69β119
- Sensoria insoles (opt.)$345
οΌ Setup & Data-Integration included
Kit from $638
- OBSBOT Tiny SE (or Tail Air)$119
- Ring / watch Γ 2 (both partners)2Γ
οΌ Setup & Data-Integration included
Kit from $577
- HoverAir X1 Pro drone$569
- Osmo Action 5 Pro$369
- Coroplast ArUco set$49β129
- Pole Β· insoles Β· HR strap$563
οΌ Setup & Data-Integration included
Kit from $1,550
Shop by capability
Biometrics β heart, motion & more
Heart-rate monitors β feeds BiometricSignal (HR / HRV)
Good
Scosche Rhythm+ 2.0
Armband Β· Scosche
HR + HRV/RRi. Open BLE + ANT+. Best child fit β stays on a squirming forearm.
$69
Good-alt
Garmin HRM-Dual
Chest strap Β· Garmin
HR + RR broadcast. Open BLE + ANT+, app-free. Teens and up.
$79
Better
Child pickPolar Verity Sense
Armband Β· Polar
HR, optical. Open BLE + ANT+, app-free, WR50, 30h. 23cm band fits a child.
$105
Best
Polar H10
Chest strap Β· Polar
Gold-standard HRV. Beat-to-beat RR, dual BLE + ANT+. XS strap fits older kids.
$119
Smart rings β passive HR / HRV / sleep / temp
Budget
NewColmi R02 / R03 / R06
Ring Β· Colmi
HR, SpO2, accel, steps. Open BLE via community
colmi_r02 client, no sub. Budget sensors + reverse-engineered protocol.$56
Good
RingConn Gen 2 Air
Ring Β· RingConn
HR / HRV / sleep, no sub. CSV + Apple Health / Health Connect export.
$229
Better β
Ultrahuman Ring AIR
Ring Β· Ultrahuman
The only fully open ring. No sub + OAuth Partner API + UltraSignal raw PPG/accel.
$349
Best Β· benchmark
Oura Ring 4
Ring Β· Oura
Best API, but locked. Mandatory ~$5.99/mo sub β buy 1β2 to benchmark only.
$349
Ring sizing β size your finger before you order a smart ring
Measure at home in two minutes
- Wrap a strip of paper or a length of string snugly around the base of the finger you'll wear the ring on.
- Mark where it overlaps, lay it flat against a ruler, and read the length in millimetres β that's your inner circumference.
- Measure at the end of the day (fingers swell), and size the finger you'll actually wear it on.
- Match the millimetres to the US size in the table. If you're between sizes, round up.
Smart rings are one solid piece β they can't be resized after purchase, so a sizing kit worn for ~24 hours is the only reliable way to get it right the first time.
US ring size reference
| US size | Inner circumference | Inner diameter |
|---|---|---|
| 5 | 49.3 mm | 15.7 mm |
| 6 | 51.9 mm | 16.5 mm |
| 7 | 54.4 mm | 17.3 mm |
| 8 | 57.0 mm | 18.1 mm |
| 9 | 59.5 mm | 19.0 mm |
| 10 | 62.1 mm | 19.8 mm |
| 11 | 64.6 mm | 20.6 mm |
| 12 | 67.2 mm | 21.4 mm |
| 13 | 69.7 mm | 22.2 mm |
Circumference figures are the standard US ring-size scale; individual brands vary slightly β always confirm against the ring maker's own chart.
Free for beta-cohort members
Joining a beta cohort across any Inua app? We'll mail you a reusable ring sizer free, so your smart ring fits first time. It's the same inexpensive plastic sizing kit we recommend to everyone else.
femometer ring sizer kit on Amazon β Reusable plastic sizing kit Β· about $5β7 Β· sizes 6β13Smartwatches β live HR / motion via WearOS & watchOS companion
Good
Galaxy Watch FE
WearOS Β· Samsung
Live HR + motion. Full Health Services API β the openest streaming path.
$229
Good-alt
Apple Watch SE 3
watchOS Β· Apple
Live HR + CoreMotion. HealthKit workout-session streaming.
$249
Better
Pixel Watch 4 / Galaxy Watch 8
WearOS Β· Google / Samsung
Openest live HR + motion. LTE variants add phone-free streaming.
$399
Insole sensors β InsoleSignal (pressure + IMU)
Good
NewArduino Nano 33 BLE Sense
IMU maker kit
MotionSample primitive. 9-axis IMU + mic + env sensors, BLE, fully open. The DIY motion-capture path.
$44
Good-alt
NewTactigon
Gesture IMU maker kit
Motion + gesture. On-board gesture engine, BLE. Feeds MotionSample for stereotypy & load.
$129β179
Better β
Sensoria Core Dev Kit
Insole Β· Sensoria
Foot pressure + gait. Real SDK + API + cloud β the best cheap ingest path.
$345
Best
Moticon Insole3
Insole pair Β· Moticon
Production-grade load/gait. BLE SDK + live UDP + CSV.
~$2,500
Shop by capability
Capture β cameras, follow & field
Auto-follow mount → the phone runs the app & is the camera · the mount just follows
Good
UBeesize Q14 Face Tracking Tripod
Onboard-AI phone mount · UBeesize
The phone follows the subject. 360° AI face & body tracking, gesture control, no app — the phone runs the app and IS the camera.
$28.32
Good β
DefaultAI auto-tracking phone mount
Onboard-AI holder · Apai Genie / AICOCO class
The phone follows the subject. Onboard person-tracking, 360° pan, app-free. For Vizanote the phone runs the app and IS the camera — no separate feed needed.
$79
Good-alt
OBSBOT Tiny SE
Auto-frame webcam · OBSBOT
Wide front-arc framing. Clean UVC webcam feed — fixed station.
$119
Better
OBSBOT Me
AI phone mount · OBSBOT
Stronger tracking & build. App-free AI gimbal mount — the phone is still the camera.
$179
Best
Standalone onlyOBSBOT Tail Air
PTZ follow-cam · OBSBOT
Standalone camera, no phone → separate PC/server. Only when you need an ingestible UVC / RTSP / NDI / HDMI / SRT feed. Not the default.
$598
Action / subject cameras β pose & CV feed
Good
AKASO Brave 8 Lite
Action cam Β· AKASO
Budget CV feed. File / USB webcam β bright light only, no HDMI.
$229
Better β
DJI Osmo Action 5 Pro
Action cam Β· DJI
Pose CV, even in dim rooms. Big 1/1.3" sensor, clean UVC + USB-C HDMI.
$319
Best
Insta360 Ace Pro 2
Action cam Β· Insta360
Best joint/hand detail. 8K, UVC out β finest CV resolution.
$449
Auto-follow drone β hands-free field capture (Inua Coach)
Good
DJI Neo
Follow drone Β· DJI
Entry follow, open field. 4K30, no obstacle avoidance.
$189
Better β
HoverAir X1 Pro
Follow drone Β· HoverAir
True controller-free follow. 4K60, USB-C offload of the on-board original.
$569
Best
DJI Mini 4 Pro
Follow drone Β· DJI
ActiveTrack360 + avoidance. 4K100 slow-mo, 34-min flight.
$759
Camera poles & stands β elevated field & room mounting
Good
Extension monopod / pole rig
Pole Β· generic
Lifts the camera. Painter-pole style reach for overhead framing.
$49
Better
Heavy tripod
Tripod Β· Neewer / Manfrotto class
Stable room mount. Handles a follow-cam or action cam securely.
$99β169
Best
Mast / high light-stand rig
Mast Β· elevated overhead
Overhead field view. Elevated rig for full-field or room-wide capture.
$199β349
Shop by capability
Calibration & audio
Visual ground markers β ArUco fiducials that ground the field / room for CV
Good
Laminated ArUco cardstock
CV calibration Β· indoor set
Indoor / disposable markers. Quick room calibration set (8β20).
$19β39
Better β
The $20 itemCoroplast ArUco marker set
CV calibration Β· 8β20 plates
Grounds the field for CV. Weatherproof, reprintable, stakes down. Design is free β you pay for the substrate + kitting.
$49β129
Ambient mic + dB / SPL meter β MM live-audio capture & decibel
Good
FIFINE K669B
USB mic Β· FIFINE
Ambient capture + approximate dB. Budget USB mic with a free dB app.
$49
Better β
miniDSP UMIK-1
Measurement mic Β· miniDSP
Ambient audio + trustworthy dB SPL. One USB mic, per-unit calibration file. Feeds MM live-audio + decibel.
$139
Best
miniDSP UMIK-2
Measurement mic Β· miniDSP
Reference-grade capture. Low self-noise for the most demanding rooms.
$229