FlockHopper vs SensorCircle
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FlockHopper
This navigation app provides two route options: the fastest and an alternative that avoids known automated license plate reader (ALPR) camera locations. It displays camera locations on the map and offers turn-by-turn voice guidance with lane hints. The app prioritizes user privacy with no account, sign-up, ads, or data sales.
- Dual route options (fastest vs. ALPR avoidance)
- ALPR camera locations displayed on map
- Turn-by-turn voice guidance with lane hints
- Background navigation
- No account or sign-up required
- No ads or third-party trackers
- Self-hosted map tiles
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FlockHopper shows you where license plate reader cameras are and routes around them. Every camera in the Deflock/OpenStreetMap database is on the map. Ask for directions and you get two routes — the fastest and one that avoids known cameras. Alerts warn you when one is nearby, whether you're navigating or just driving. Most of the app is free: directions, turn by turn navigation, camera alerts, background detection, CarPlay, Live Activity, Free Drive, saved places, Siri Shortcuts, and the full camera map. Users that upgrade to FlockHopper Pro get custom alert tones and timing, exposure stats, multi-stop routing, longer routes, offline maps, extra map styles, and live traffic. No account, no ads, no analytics, no trackers, no data sales. Route requests go to FlockHopper's own servers, and nothing is logged. Built by the developer behind maps.deflock.org, working closely with the DeFlock community on camera data. One person, no investors. There is a Tip Jar if you want to support the project. It doesn't unlock anything. Camera data is crowdsourced by DeFlock and the OpenStreetMap community. Coverage varies and won't always be current. FlockHopper reduces your exposure to surveillance networks but doesn't eliminate it. Drive safely. Not affiliated with or sponsored by any surveillance vendor. Privacy policy: https://dontgetflocked.com/privacy
SensorCircle
Instantly access U.S. sex offender registry data on a map. Search by your current location, any address, or by tapping on the map to view offender details and links to official records. Data is updated nightly and covers all 50 states.
- Map-based sex offender registry
- Search by GPS location
- Search by address
- Tap anywhere to search
- Offender details and photos
- Links to official state registries
- Nightly data updates
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SensorCircle puts the sex offender registry on your map — instantly and completely free. Whether you're checking your neighborhood, researching a school zone, or moving to a new area, SensorCircle gives you immediate map-based access to registered sex offenders near any location in the United States. SEARCH BY YOUR LOCATION SensorCircle uses your GPS to instantly display all registered sex offenders within 1, 3, or 5 miles of where you are right now. TAP ANYWHERE ON THE MAP Want to check a specific park, school, or street? Tap anywhere on the map and SensorCircle searches that exact location instantly. SEARCH ANY U.S. ADDRESS Type in any U.S. address to find registered offenders nearby — great for checking a new neighborhood before you move or visit. OFFENDER DETAILS Tap any map marker to see the offender's photo, registered address, and offense information. One more tap links directly to their official state registry record. THE DATA All data is sourced from the National Sex Offender Public Website (NSOPW), operated by the U.S. Department of Justice. SensorCircle displays publicly available sex offender registry data from all 50 states, Washington D.C., U.S. territories, and tribal nations — updated nightly from official government sources. Over 500,000 registered sex offenders tracked. 640,000+ confirmed locations. Updated every night. WHY SENSORCIRCLE - Completely free — no ads, no subscriptions, no paywalls - Native map experience — not a link to a government website - Covers all 50 states, D.C., and U.S. territories - Nightly data refresh from official sources - Offender photos, addresses, and state registry links - 1, 3, or 5 mile radius search options IMPORTANT SensorCircle displays publicly available information from official government sex offender registries. All data is sourced from NSOPW and the respective state registries. SensorCircle does not independently verify registry data and is not responsible for its accuracy. Users should consult their state's official registry for the most authoritative information. This app is intended for public safety awareness purposes only. SUPPORT If SensorCircle has been useful to you or your family, you can support its continued development through the tip jar inside the app or at sensorcircle.com/keepitfree Questions? Contact us at support@sensorcircle.com
Screenshots
Verdict
FlockHopper and SensorCircle both sit at 4.7 stars, but that hides the real split: 81% of FlockHopper's written reviews are positive against 0% of SensorCircle's. FlockHopper also leads on ratings volume (304 vs 11) and chart position (#61 vs unranked). SensorCircle's advantage is in-app purchases (none vs 4) and update cadence (every 2 weeks vs every 2 months). On price, rating and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. FlockHopper sells 4 one-off in-app purchases. SensorCircle asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.7 for FlockHopper against 4.5 for SensorCircle. That said, the two scores are not equally well evidenced: FlockHopper has 304 ratings behind it against 11, so its average is the more settled of the two. Written reviews are what separate them: 81% of FlockHopper's written reviews are positive against 0% of SensorCircle's.
FlockHopper ships an update every 2 months, SensorCircle every 2 weeks. Both last shipped on October 31, 2026.
| Parameter | FlockHopper | SensorCircle |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (304 ratings) — better | 4.5 (11 ratings) |
| Positive reviews | 81.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 304 — better | 11 |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Best chart rank | #61 — better | — |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 64 MB | 8 MB |
| Age rating | 17+ | 17+ |
| Developer | OpenRoad Labs LLC | Lunar Mobile Solutions LLC |
Customer experience
FlockHopper
SensorCircle
In-app purchases
FlockHopper
- Lil' Hopper$4.99
- Certified FlockHopper$9.99
- Mother Flocker$24.99
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- Un-Flock-Able$49.99
SensorCircle
No in-app purchases






