Comparison

imp™ vs Sonar

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

imp™

This app works with a smart home device to filter unwanted landline calls, allowing only desired contacts to reach you. It also functions as a remote answering machine for your landline, letting you manage voicemails from anywhere.

Highlights
  • Real-time call filtering
  • Greenlist Technology™
  • Syncs iPhone contacts
  • Remote voicemail access
  • Do Not Disturb mode
  • Invite others to landline
Read full description

Use of the imp app™ requires our WiFi-enabled imp box™ (sold separately). Meet imp™ - the smart, simple, and easy solution for making landline spam calls go away. Powered by our Greenlist Technology™, the imp app, and imp box work together to eliminate all unwanted landline calls. This real-time call-filtering technology silently handles the calls you don't want to deal with, freeing you up to focus on welcoming only those calls you actually want to receive. With your imp box in place, the app gives your landline phone superpowers. After seamlessly syncing your iPhone's contacts with your landline at setup, you are ready to receive calls only from people you want to talk to. That means no more spam, scam, telemarketing, robo, or any other unwanted caller of any shape or size. imp is the first smart home answering machine, allowing you to receive and listen to your home's landline voicemails no matter where in the world you are. imp-sters also have the ability to put their landline into "Do Not Disturb" mode, as well as invite others to your landline. Created by our team of experts from the fields of old-school landline technology, secure networks, and modern telecommunications, imp is a new approach to your landline phone experience. With imp you now have the power to welcome calls by design, and silence the rest. To learn more about imp, visit us at: www.joinimp.com

About

Sonar

Features
Read full description

SONAR: HIDDEN CAMERA AND TRACKER DETECTOR Sonar helps you check for hidden cameras, hidden microphones, and Bluetooth/Wi-Fi trackers, a privacy inspection support tool with infrared, Wi-Fi network, and Bluetooth scanning. Whether you're in a motel room, hotel, Airbnb, locker room, public restroom, fitting room, car, or your own luggage, Sonar helps you inspect the space in minutes. IMPORTANT: no phone app can guarantee with certainty that a space is free of hidden cameras. Sonar is a support tool, each finding comes with a confidence level so you can physically check the spot it flags. Always use it alongside a manual inspection. DETECTOR FEATURES Infrared scanner Point your phone's camera and look for the telltale reflection of hidden spy camera lenses, a common sign in cameras disguised as a button camera, pen camera, charger, smoke detector, or clock. Works best in a dark room and doesn't replace a physical check. Wi-Fi network and Bluetooth device detection Sonar scans the local Wi-Fi network and nearby Bluetooth devices to flag devices with characteristics of connected cameras or trackers. Each result shows a confidence level, not a definitive confirmation. Bluetooth tracker detector Flags signals from Bluetooth trackers nearby: in your car, bag, luggage, or personal belongings, as support against unwanted tracking during travel and everyday life. Guided sweep A practical checklist walks you through spots where cameras and microphones are commonly hidden: outlets, smoke detectors, picture frames, mirrors, chargers, clocks, and more, so you can physically inspect each one. Clear, straightforward results See the confidence level of each finding, with real-time visual indication, no technical jargon. WHY USE SONAR Works offline Simple interface anyone can use Fast: full sweep in just a few minutes No complicated sign-up GREAT FOR - Motel, hotel, and Airbnb stays - Short-term rentals and vacation homes - Locker rooms, gyms, and public restrooms - Store fitting rooms - Checking your car and luggage for trackers - Confidential meetings and work spaces YOUR PRIVACY COMES FIRST Hidden cameras and trackers are more common than you'd think. Sonar exists to give you a support tool for checking your space, simple and accessible, always as a complement to your own inspection, never as an absolute guarantee. WHERE YOU CAN USE SONAR Hotel room · Motel room · Airbnb · Vacation rental · Bed and breakfast · Hostel · Resort · Spa · Sauna · Public restroom · Gym locker room · Pool locker room · Club locker room · Store fitting room · Lingerie fitting room · Event or theater dressing room · Meeting room · Shared office · Coworking space · Rental car · Uber or taxi · Rented beach house · Vacation cabin · Guest room at someone else's home · Doctor's office or clinic · Short-term rental property THE GUIDED CHECKLIST COVERS COMMON SPOTS LIKE Smoke detector · Wall clock · Desk clock · Alarm clock · Phone charger · USB wall adapter · Power strip · Wi-Fi router · Bluetooth speaker · Wall art · Picture frame · Mirror · Desk lamp · TV remote control · Teddy bear · Glasses · Pen · Keychain · Fake potted plant · Book on a shelf Download Sonar now and run your first sweep in under 2 minutes. ---------------------------- Terms of Use (EULA): https://sonarcameradetector.com/terms

Screenshots

imp™3 screens
Sonar4 screens

Verdict

The call

The clearest difference is in-app purchases: imp™ at none against Sonar's 3. imp™ also leads on device support (3 vs 1) and iOS requirement (12.1 vs 16.4). Sonar's advantage is update cadence (every 3 weeks vs every 2 months). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Sonar sells 3 in-app purchases, starting at $4.99 per 7 days. imp™ asks for nothing beyond the download.

UpkeepUpdate frequency

imp™ ships an update every 2 months, Sonar every 3 weeks. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
imp™ versus Sonar: the parameters behind the verdict, then further details
Parameterimp™Sonar
PriceFreeFree
Rating5.0 (12 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings12 — better—
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.1 — better16.4
Further details — not scored
Size36 MB55 MB
Age rating4+4+
DeveloperIts My Phone, IncCaue Mattos Silvestre

In-app purchases

None

imp™

No in-app purchases

3 purchases

Sonar

Subscriptions3
  • Weekly$4.997 Days
  • Monthly Subscription$8.991 Month
  • Annual Subscription3 Days trial$29.991 Year

Questions

Is imp™ free?
imp™ is free to download, with no in-app purchases.
Is Sonar free?
Sonar is free to download, with in-app purchases available.
Do imp™ or Sonar have ads?
Neither imp™ nor Sonar shows ads.
Which is updated more often, imp™ or Sonar?
imp™ ships an update every 2 months, and Sonar every 3 weeks. Most recently, imp™ was updated on October 24, 2026 and Sonar on October 31, 2026.

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