The case for Anchored.
Anchored is an iPhone app, paired with small Bluetooth beacons, that hard-blocks different apps depending on which room of the house you’re in. Every family member, parents included, is held accountable by the others. No product we found combines multi-room blocking with whole-family accountability; each half exists only on its own.
People want to cut back. Willpower keeps losing.
Timers get dismissed and blockers get switched off by the same person they’re meant to stop. “Keep phones in shared rooms” is common advice that nothing enforces.
Also: 95% of US teens have a smartphone (Pew), 87% of US teens own an iPhone (Piper Sandler, fall 2025), and 38 states plus DC require schools to ban or restrict phones (June 2026).
Change the environment, and share the key.
The idea comes from Atomic Habits: designing your environment beats relying on willpower. Anchored makes that physical, with two core features. Everything else supports them.
1. Room-based blocking
Each room has its own blocklist that switches on when you walk in and off when you leave. Hard blocks, not friction screens. Rules differ per person, essentials never get blocked, and schedules can only tighten a room.
2. Whole-family accountability
Nobody approves their own extra time. Parents approve each other and the kids; everyone, kids included, sees everyone’s usage. Apple’s Screen Time only lets parents manage kids, and partner apps cover two adults but not a family.
Knowing which room you’re in, on a standard iPhone.
The phone listens for a Bluetooth Low Energy beacon in each room and matches the signal pattern against a map learned at setup. This is called fingerprinting, and it’s the most accurate approach realistic on an iPhone without UWB.
Fingerprint
A setup walk through each room, phone held different ways, records every beacon’s strength and gives each room a signature.
Match with hysteresis
Live readings are compared to the fingerprints. The app only switches when another room is clearly better, about 5–10 dB, for a few seconds, so doorways don’t flicker.
Gate on motion, learn from mistakes
The accelerometer ignores blips while you’re still. A “wrong room” tap adds the reading to that room’s fingerprint, so each home gets more accurate.
Why Bluetooth, and what we ruled out
| Option | Verdict |
|---|---|
| BLE fingerprinting | Chosen. Works on any iPhone, in the background, with cheap beacons. |
| UWB | About 10 cm precise, but needs iPhone 11+ and works best with the app open. Candidate tiebreaker. |
| Ultrasound | Stays in rooms well, but needs the microphone and may bother kids and pets. |
| Wi-Fi scanning | Not available to iOS apps. |
| NFC / RFID | Needs a manual tap; passive RFID can’t be read by a phone across a room. |
The location engine is radio-agnostic, so UWB or ultrasound can be added later for close calls.
The beacons
- One per room, on an inward-facing wall away from doorways. Walls blocking the signal are the feature that separates rooms.
- Directional by design. A hand-sized reflector about 3 cm behind the antenna pushes the 2.4 GHz signal into the room; the production beacon uses a built-in patch antenna.
- Plug-in or battery, no rechargeables. Plug-in beacons also check in over Wi-Fi, so an unplugged one gets noticed.
- iBeacon format, so iOS wakes the app in the background on room changes.
- Doorway gating is being tested: two low-power anchors, or one directional anchor above the door, to detect crossings and their direction.
Accuracy test plan
The same paths, walked many times, comparing correct-room rate and doorway error rate across four setups: a single-beacon signal-cutoff baseline (how existing one-zone products work), multi-beacon fingerprinting, fingerprinting plus doorway gates or a directional door beacon, and fingerprinting plus UWB at the bedroom door.
Ten rules that make it a system, not a settings screen.
- Default deny. Apps are blocked unless the phone proves it’s somewhere they’re allowed.
- Unlocks are leases. They expire unless renewed by fresh beacon sightings.
- Essentials are never blocked. Calls, texts, maps, music, emergency.
- Most precise signal wins. Room beacons beat GPS; GPS beats “nowhere”; nowhere counts as private.
- Time only narrows. Schedules restrict a zone further, never loosen it.
- Most restrictive wins when rules conflict.
- Tighten alone, loosen together. Loosening needs an approver’s signed approval.
- Grants expire. Each approval covers specific apps for a set time.
- Tampering is visible. Uninstalling, revoking access or going silent alerts approvers.
- Visibility, not spying. Rules, requests and alerts, never messages or browsing.
On the phone (works offline)
- Location engine fuses beacon, GPS and motion into a room plus a confidence score.
- Policy engine checks one person’s rules against room, time and active grants.
- Enforcement applies Apple Screen Time shields (FamilyControls, ManagedSettings, DeviceActivity).
Circle service (cloud)
- A graph of who approves whom. Families, couples and roommates are just different graphs.
- Versioned, signed policies cached on each phone, so they hold offline and can’t be edited locally.
- Approvals return signed, expiring tokens the phone verifies itself, like two-person integrity.
Tamper monitor
- Missed check-ins from a phone or beacon raise alerts to approvers.
- Adults can always remove a Screen Time app on iOS, so the goal is that no bypass happens quietly.
- Kids on Apple child accounts are locked down through Family Sharing.
People already pay to put their phones down.
US parental-control software alone is about $266M in 2026, growing about 10% a year, and that excludes adult focus apps, hardware blockers and school phone pouches.
Early-buyer sizing (US, estimates)
| Segment | US pool | Early buyers |
|---|---|---|
| Families | ~12M households that prioritize screen time | ~0.4M |
| Couples | ~64M married-couple households | ~0.3M |
| College students | 19.4M enrolled | ~0.2M |
| Anyone | ~139M adults who say they overuse | ~0.3M |
| Total | Pools overlap | ~1.2M |
Sources: Pew Research Center, Market Data Forecast, RevenueCat and company reports, collected October–November 2026. Sizing figures are estimates.
Each piece exists. Nobody has put them together.
| Product | What it does | Gap |
|---|---|---|
| ScreenZen Halo | Bluetooth puck; blocks apps within a set radius | One zone; friction rather than hard blocks |
| Brick / Brick Night | NFC tap to lock; bedroom-entry blocking | Manual tap or one zone; owner can undo it |
| Bloom | NFC card, tap to lock | Manual; individuals only |
| Opal | App blocker with schedules | No location; individuals |
| Bark | Monitoring, filters, schedules | Parents only; no rooms |
| AppBlock, Jomo, Focus Fence, Locked In, Jolt | GPS zone blocking | No room-level detection |
| LockPact | Two people lock each other’s apps | Pairs only; no family or kids |
| Kaiteki | Family app that includes parents | Goals and points, not hard blocks |
| Apple Screen Time | Parents manage kids | One-way; adults can’t manage each other |
| Anchored | Per-room hard blocks plus whole-family approvals | — |
Products and features as found in October–November 2026. The biggest threat is a hardware incumbent adding multi-room support. Our answer: move quickly, make precision the brand, and win on adult circles and co-signed approvals, which none of them offer.
A beacon kit once, a plan every year.
Hardware gets a household started; the yearly plan pays for the family layer. Pricing is still being tested.
Home kit
Several beacons for families and couples, plus a household plan that covers everyone in the home.
Solo kit
One beacon for a desk, dorm or bedside, with a lower-cost plan for students and individuals.
Free approvers
People who only approve requests use the app free. Every approver sees the product working, which makes them a built-in referral loop.
Go to market
Launch the home kit to families and couples together. Add students the next semester; BYU’s roommate-heavy housing is a cheap early market. Then sell beacons to dorms, offices and schools.
Prove detection first.
Both core features depend on knowing the room. So the first milestone is a detection-only build tested in real homes, before any custom hardware.
- Dec 2026
Anchors and room locking
Build the beacons and get apps locking and unlocking by room on an iPhone.
- Jan 2027
Approvals and field testing
Add partner approvals. Test in 3–4 other homes and a dorm, and fix wrong-room errors.
- Feb 2027
Showcase
Refine from test results and demo live: walk into a taped-off “bedroom” and watch the app lock.
- Next
Families, then custom hardware
Two-week tests with real families including kids, a public waitlist, then a custom beacon with a patch antenna in plug-in and battery versions. Android later.
What could go wrong, and the plan for it.
| Risk | Plan |
|---|---|
| Apple’s Family Controls entitlement | Required to block apps at all. Apply early, for the app and all three extensions; development builds work in the meantime. |
| Signal leaking through walls | The main technical risk. Prove accuracy in real houses before building custom hardware; fingerprinting, hysteresis and directional antennas all target it. |
| Privacy | Be explicit about what’s stored and who sees it; keep room history off the server where possible. |
| Family friction | Transparency can cause arguments as easily as trust. Onboarding sets expectations, and rules apply to parents too. |
| Incumbents copying | Move fast, own precision, and lead on multi-adult circles. |
Andrew Higgins
Computer Engineering at BYU and a full-stack engineer and team lead at Moat. Previously built Outlier Node, a battery-powered BLE vibration sensor shown at Student Innovator of the Year 2026.