Comparison

Dowse vs Sysly

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

Head to head
About

Dowse

Detect hidden cameras and trackers in your surroundings using your phone's sensors. It scans Wi-Fi and Bluetooth devices, guides you through a physical inspection, and helps locate lost Bluetooth items. The app also alerts you to persistent unknown trackers.

Highlights
  • Wi-Fi device scanning
  • Bluetooth tracker detection
  • Guided physical inspection
  • Lens glint scanner
  • Infrared scope
  • Lost Bluetooth item finder
  • Persistent tracker alerts
Features
Read full description

Someone found a camera in an Airbnb once, and the whole internet remembers. You still have to sleep somewhere tonight. Dowse checks a room in one walk. You go from place to place while the Wi-Fi and Bluetooth checks run underneath, and the room seals into one report you can keep or share. THE WALK Eight places cameras actually hide, one at a time: the smoke detector, the alarm clock, the USB charger charging nothing, the air vent, the shelf, the bathroom, the TV and the mirror. At each one, hold to look. Dowse strobes your flashlight and watches for the tiny glint a lens sends back, with night vision built in for cameras that light the room in infrared. If something flashes back, its photo stays in your report. If it turns out to be a screw, tap It was nothing. THE WI-FI AND BLUETOOTH While you walk, Dowse knocks on the room's Wi-Fi address by address and flags anything that behaves like a camera, quoting the device's own words when it gives any. Bluetooth listens for 20 seconds for trackers and gadgets that have no business in a rented bedroom. PULL THE PLUG Found a camera-like device on the Wi-Fi but can't see it? Unplug things in the room one at a time. Your phone buzzes the moment it drops off the network, so you know which object it was. THE HONEST PART Every room also says what it couldn't check. A camera that records to a memory card and never joins a network is invisible to every phone app, ours included, which is why the eight places exist. If Bluetooth is off or you're on mobile data, Dowse tells you before you start, and a room that couldn't check anything doesn't use up your free check. FIND YOUR LOST STUFF Earbuds under the couch again. Pick the device and walk. The number climbs as you get closer and the Geiger clicks speed up. 60... 74... 91. There they are. Tap Found it. Works with anything that speaks Bluetooth. WATCHING YOUR BACK Dowse notices when the same unknown tracker keeps turning up around you in different places, and stays silent otherwise. No alerts about your neighbor's speaker. Your first room is free. After that, Dowse needs an active subscription. TERMS: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Sysly

Features
Read full description

Sysly puts everything about your network and your iPhone in one place, explained in plain language under every result. NETWORK • Scan your Wi-Fi and view discovered devices, addresses and available services • Ping, port check, DNS lookup and whois in one tool • Speed test with a live gauge and your data cost shown before it starts • Traceroute with per-hop timing (Pro) MONITOR • Live CPU, memory, storage, thermal state, battery and uptime • Streaming charts that pause when you want them to • Home Screen and Lock Screen widgets, Control Center buttons and a Live Activity while a scan runs DEVICE • Device model, chip, GPU, memory, screen and sensor details, using an on-device catalog where available DIAGNOSTICS • Display, multi-touch, speaker, microphone, camera, haptics, sensors and charging-rate checks you run yourself, with a report you can export (Pro) HONEST BY DESIGN • One purchase unlocks Pro for good. No subscription, no account, no ads • Scan history stays on your device. No usage-analytics or tracking SDKs • Arabic and English, fully right-to-left Sysly uses only public iOS APIs. iOS does not expose battery cycle count or capacity to apps; Pro can import Apple's own Analytics battery report as a snapshot.

Screenshots

Dowse4 screens
Sysly4 screens

Verdict

The call

The clearest difference is update cadence: Dowse at every 4 days against Sysly's monthly. Dowse also leads on iOS requirement (17.0 vs 26.5). On price, ads, in-app purchases and device support 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. Dowse sells 3 in-app purchases, starting at $3.99 per month and Sysly sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Dowse ships an update every 4 days, Sysly monthly. The most recent releases landed on October 24, 2026 and October 26, 2026 respectively.

Scorecard2 real differences · 7 level
Dowse versus Sysly: the parameters behind the verdict, then further details
ParameterDowseSysly
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 4 days — betterMonthly
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhoneiPhone, iPad — better
Requires iOS17.0 — better26.5
Further details — not scored
Size20 MB38 MB
Age rating4+4+
DeveloperRedjan Hysahamam alabdulla

In-app purchases

3 purchases

Dowse

Subscriptions2
  • Monthly$3.991 Month
  • Yearly$19.991 Year
One-time1
  • Lifetime$39.99
1 purchases

Sysly

One-time1
  • Sysly Pro$9.99

Questions

Is Dowse free?
Dowse is free to download, with in-app purchases available.
Is Sysly free?
Sysly is free to download, with in-app purchases available.
Do Dowse or Sysly have ads?
Neither Dowse nor Sysly shows ads.
Which is updated more often, Dowse or Sysly?
Dowse ships an update every 4 days, and Sysly monthly. Most recently, Dowse was updated on October 24, 2026 and Sysly on October 26, 2026.

Other comparisons