🔹 FOUNTAIN VENTURE STUDIO

How to Build a
Physical AI Product

4 Dimensions · 3 Filters · Decision Matrix

STEP 01 — FOUR DIMENSIONS

Position across four axes

AI Capability
× 10
What's the soft intelligence? Text, vision, voice, multimodal, memory, reasoning, agentic, on-device…
A1 TextA2 VisionA3 VoiceA4 MultimodalA5 MemoryA6 ReasoningA7 AgenticA8 GenerationA9 On-deviceA10 Embodied
A1 TextA2 VisionA3 VoiceA4 MultimodalA5 MemoryA6 ReasoningA7 AgenticA8 GenerationA9 On-deviceA10 Embodied
Physical Capability
× 22
What can the hardware sense? Camera, mic, mmWave, PPG, LiDAR — and where does compute run?
S1 CameraS2 MicS3 mmWaveS4 GPSS5 IMUS6 PPGS7 BioelectricS8 BLE/WiFiS9 LiDARS10 TactileS11 EnvironS12 TempS13 GasS14 UltrasonicS15 SpectralS16 EncoderS17 BatteryS18 LoadCP1 CloudCP2 PhoneCP3 HybridCP4 Edge
S1 CameraS2 MicS3 mmWaveS4 GPSS5 IMUS6 PPGS7 BioelectricS8 BLE/WiFiS9 LiDARS10 TactileS11 EnvironS12 TempS13 GasS14 UltrasonicS15 SpectralS16 EncoderS17 BatteryS18 LoadCP1 CloudCP2 PhoneCP3 HybridCP4 Edge
Form Factor
× 66
What does it look like? Wearable, standalone device, or embodied robot.
F1 WatchF2 RingF3 GlassesF4 EarbudsF5 BadgeF6 NecklaceF18 TerminalF22 SpeakerF44 HumanoidF46 QuadrupedF60 Drone+55 more
WEARABLEF1 WatchF2 RingF3 GlassesF4 EarbudsF5 BadgeF6 NecklaceF7 BraceletF8 ClothingF9 ShoesF10 HelmetF11 GogglesF12 Clip MicF13 BeltF14 ExoF15 Sleep MaskF16 HeadbandF17 BackpackSTANDALONEF18 TerminalF19 Scan PenF20 DisplayF21 E-inkF22 SpeakerF23 CameraF24 Toy/EdF25 HealthF26 TWS CaseF27 ProjectorF28 TranslatorF29 Dash CamF30 LockF31 3D PrintF32 POSF33 ConferenceF34 IndustrialF35 MedicalF36 ScaleF37 LampF38 BedF39 PillowF40 MirrorF41 RouterF42 ChargerF43 BathROBOTF44 HumanoidF45 Small Hum.F46 QuadrupedF47 WheeledF48 Home CleanF49 Com. CleanF50 WarehouseF51 Delivery OutF52 Delivery InF53 CobotF54 Heavy Ind.F55 InspectionF56 SurgicalF57 RehabF58 CompanionF59 EducationF60 DroneF61 UnderwaterF62 AgricultureF63 ConstructionF64 Auto VehicleF65 Food PrepF66 Mow/Pool
Target User
× 30
Who is it for? No clear user = tech demo, no commercial loop.
P1 New ParentsP2 K-12P3 Young AdultsP4 ElderlyP5 Pet OwnersP7 FitnessP10 CreatorsP15 DoctorsP18 Executives+21 more
P1 New ParentsP2 K-12P3 Young AdultsP4 ElderlyP5 Pet OwnersP6 WomenP7 FitnessP8 SleepP9 WellnessP10 CreatorsP11 Tech GeeksP12 ChronicP13 Access.P14 OutdoorP15 DoctorsP16 LawyersP17 CreativesP18 ExecutivesP19 EngineersP20 Retail/F&BP21 MaternityP22 MenP23 Public SafetyP24 CaregiversP25 TeachersP26 LogisticsP27 ConstructionP28 FactoryP29 DomesticP30 Drivers
STEP 02 — THREE FILTERS

Filter through 3 gates

FILTER 01
Tech Timing
AI Model Readiness — the starting gun.
T1 Now
Mature & usable — API callable or edge-deployable
T2 Near
12–18 months out — demos exist, not yet productized
T3 Next
2–3 years out, academic only — keep an eye
FILTER 02
Cost Curve
Per-interaction unit economics. Token cost is the critical variable.
C1 Ready
Coverable by business model — subscription, margin, or ads
C2 Declining
Dropping fast — viable within 12–18 months
C3 Premature
Too high — not economically viable short-term
FILTER 03
Form Factor Fit
Friction = form × sensor combination, not form alone.
🟢 Habitual
Fits existing mental model — form is an accelerator
🟡 Adaptive
Requires mental adjustment — value must drive adoption
🔴 Contrary
Against mental model — needs 10×+ value or reject
STEP 03 — DECISION SPECTRUM

From GO to KILL

T1C1🟢
GO
Ship now. Form is an accelerator — lowers CAC.
T1C1🟡
GO (caution)
Ship, but must deliver 3-5× value.
T1C1🔴
HOLD
Form fights instinct. Need 10×+ or stop.
T1C2🟢
LOCK & BUILD
Lock supply chain, enter when cost arrives.
T1C2🟡
LOCK (validate)
Use wait window to test form fit.
T1C2🔴
PAUSE
Cost + form both blocking. Wait.
T2C1🟢
VALIDATE
Ready when AI lands. Track models.
T2C1🟡
VALIDATE (risky)
AI + form both uncertain. Risk compounds.
T2C1🔴
DEPRIORITIZE
Two unknowns too many. Move to backlog.
T2C2🟢
WATCH (priority)
Green form = revisit this one first.
T2C2🟡
WATCH
Standard quarterly review.
T2C2🔴
NEAR-KILL
Triple headwind. Deprioritize hard.
KILL
T3C3
Any T3 🔴 or C3 🔴 with insufficient value multiplier. Stop evaluation.
Ready to use the framework?
Compose a direction or Analyze a product.
FOUNTAIN BUILDER AGENT

Composer

Pick from each axis, then generate an AI product analysis.

AI Capability
0
A1TextA2VisionA3VoiceA4MultimodalA5MemoryA6ReasoningA7AgenticA8GenerationA9On-deviceA10Embodied
Sensor
0
S1CameraS2MicS3mmWaveS4GPSS5IMUS6PPGS7BioelectricS8BLE/WiFiS9LiDARS10TactileS11EnvironS12TempS13GasS14UltrasonicS15SpectralS16EncoderS17BatteryS18Load
Compute
0/1
CP1CloudCP2PhoneCP3HybridCP4Edge
Form Factor
0
Wearable · 17
F1WatchF2RingF3GlassesF4EarbudsF5BadgeF6NecklaceF7BraceletF8ClothingF9ShoesF10HelmetF11GogglesF12Clip MicF13BeltF14ExoF15Sleep MaskF16HeadbandF17Backpack
Standalone · 26
F18TerminalF19Scan PenF20DisplayF21E-inkF22SpeakerF23CameraF24Toy/EdF25HealthF26TWS CaseF27ProjectorF28TranslatorF29Dash CamF30LockF313D PrintF32POSF33ConferenceF34IndustrialF35MedicalF36ScaleF37LampF38BedF39PillowF40MirrorF41RouterF42ChargerF43Bath
Robot · 23
F44HumanoidF45Small Hum.F46QuadrupedF47WheeledF48Home CleanF49Com. CleanF50WarehouseF51Delivery OutF52Delivery InF53CobotF54Heavy Ind.F55InspectionF56SurgicalF57RehabF58CompanionF59EducationF60DroneF61UnderwaterF62AgricultureF63ConstructionF64Auto VehicleF65Food PrepF66Mow/Pool
Target User
0
P1New ParentsP2K-12P3Young AdultsP4ElderlyP5Pet OwnersP6WomenP7FitnessP8SleepP9WellnessP10CreatorsP11Tech GeeksP12ChronicP13Access.P14OutdoorP15DoctorsP16LawyersP17CreativesP18ExecutivesP19EngineersP20Retail/F&BP21MaternityP22MenP23Public SafetyP24CaregiversP25TeachersP26LogisticsP27ConstructionP28FactoryP29DomesticP30Drivers
SELECTED COMBINATION
Pick at least one from each axis…
FOUNTAIN BUILDER AGENT

Analyze

Decode existing products or generate new product proposals.

🔍 Product Breakdown
Enter an existing product name or URL — AI decodes its 4D position and 3-filter verdict.
💡 Idea → Product Proposal
Describe a product idea or user need — AI generates a full Physical AI product proposal with 4D positioning, 3-filter assessment, cost estimates, and go-to-market insight.
FOUNTAIN BUILDER AGENT

Library

Real products decoded through the framework.

🔥 Latest Discoveries
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Fetching latest Physical AI products…
Plaud NotePin
📦 $169📱 $79/yr
A1TextA3VoiceA5MemoryS2MicCP3HybridF5BadgeP18BizP15DocP16Law
T1C1🟡
GO → T1+C1
Does one thing: ambient recording + AI transcription. High-LTV users, real meeting pain.
📍 SZ, CN
Meta Ray-Ban
📦 $299📱 Free (Meta AI)
A2VisionA3VoiceA4MultiS1CamS2MicCP3HybridF3GlassesP3YouthP10Creators
T1C1🟢
GO → 🟢 Accelerator
Ray-Ban sunglasses that happen to have AI. Form has standalone value. First-person camera data no phone can capture.
📍 Menlo Park, US
Oura Ring
📦 $299–$549📱 $5.99/mo
A5MemoryA9On-deviceS6PPGS12TempS5IMUCP2PhoneF2RingP8SleepP7Fitness
T1C1🟢
GO → Zero friction
Fully passive — no interaction needed. Ring form everyone knows. 24/7 health data a watch can't match for sleep.
📍 Oulu, FI
Humane AI Pin
📦 $699📱 $24/mo
A1TextA3VoiceA4MultiS1CamS2MicCP1CloudF5BadgeNo clear user
T2→T1 misjudgedUX cost ∞🔴
KILL
Talk to chest, read palm laser. Unnatural in any public setting. "For everyone" = for no one.
📍 SF, US
Rabbit R1
📦 $199📱 Free
A1TextA3VoiceA7AgenticS2MicS1CamCP1CloudF18TerminalP11Geeks
T3→T1Value=0🔴
KILL → T3 core
No physical-world precedent. LAM was T3. Everything it does, a phone does better. Shelved in 2 days.
📍 LA, US
Whoop 5.0
📦 $0 (included)📱 $30/mo
A5MemoryA9On-deviceS6PPGS5IMUS12TempCP2PhoneF1BandP7FitnessP22Men
T1C1🟢
GO → Zero friction
No screen, no buttons. Fully passive strain + recovery tracking. Band form is invisible under clothing. Subscription-first model with high retention among serious athletes.
📍 Boston, US
Even Realities G2
📦 $499📱 Free tier + Pro
A1TextA3VoiceA4MultiS2MicS1CamCP3HybridF3GlassesP18BizP3Youth
T1C1🟢
GO → 🟢 Accelerator
Lightest AI glasses (35g). Micro-LED display for real-time translation + teleprompter. Camera added in G2 for multimodal. Looks like normal glasses — form is an accelerator.
📍 BJ, CN
Looki L1
📦 $199📱 Free tier
A2VisionA3VoiceA4MultiA5MemoryS1CamS2MicCP3HybridF5BadgeP3YouthP18Biz
T1C1🟢
GO → 🟢 Habitual
Proactive AI wearable — 12MP camera + mic, scene-adaptive modes (Expo/Fitness/Everyday). Clip-on badge form is invisible and socially accepted. Trust Light for privacy. 12hr battery, 32GB onboard.
📍 SZ, CN
Tesla Optimus
📦 Target $20–30K📱 TBD
A10EmbodiedA2VisionA6ReasoningS1CamS5IMUS16EncoderS10TactileCP4EdgeF44HumanoidP28FactoryP26Logistics
T2C2🟢
VALIDATE → T2+C2
Embodied AI is T2 — manipulation dexterity and autonomous task planning not yet production-grade. Humanoid form accepted in factory context. Tesla's vertical integration (motors, batteries, FSD neural nets) gives unique cost advantage.
📍 Austin, US
Skyris
📦 TBD📱 TBD
A2VisionA3VoiceA4MultimodalA5MemoryS1CamS2MicS5IMUS8FlightCP3HybridF60DroneP4ElderlyP8Sleep
T2C2🟡
VALIDATE → T2+C2
AI-powered flying companion robot — provides emotional support and daily assistance through autonomous flight and real-time human interaction. Novel form factor (indoor drone companion) is unprecedented. Autonomous indoor flight + conversational AI both still T2.
📍 SF, US