Comparison

Radiator Calculator Pro vs Hidden Camera Detector

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

Head to head
About

Radiator Calculator Pro

Accurately calculate the heating requirements for any room in your home. This tool supports unlimited rooms, offers precise calculations in Watts and BTU, and features a clean, intuitive design with dark mode support.

Highlights
  • Calculate heating requirements
  • Support for all room types
  • Precise Watts and BTU output
  • Unlimited room saving
  • Intuitive user interface
  • Dark mode support
Features
Read full description

Room-by-room radiator sizing. Watts and BTU/h output for any room, factoring volume, glazing, external walls, roof and floor exposure, and insulation standard. Calculation Heat output per room with adjustments for: • Room type (8 presets: bedroom, living room, bathroom, kitchen, hallway, office, conservatory, garage) • Internal volume • Window-to-floor ratio • Number of external walls (0–4) • What's above (loft, pitched roof, flat roof, heated space) • What's below (garage, unheated cellar, uninsulated floor, heated floor) • Insulation level: poor (older single-glazed) → average (modern build) → good → excellent (new-build, triple-glazed) • Mean water temperature - ΔT30, ΔT35, ΔT40, ΔT50, ΔT60 ΔT correction uses the standard panel-radiator exponent (n = 1.30) per EN 442 testing convention. A 5% safety margin is applied to avoid undersizing. Heat-pump systems Select ΔT35 or ΔT30 to spec radiators for low-temperature systems. Output is rescaled — a 1000W ΔT50-rated radiator delivers ~630W at ΔT35 — so you size to actual delivered heat, not nameplate. Output • Watts and BTU/h side-by-side • Metric or imperial dimensions • Whole-home heat-loss total • Share or export room specs as text For plumbers, heating engineers, and heat-pump installers sizing radiator schedules, and homeowners or landlords running their own jobs.

About

Hidden Camera Detector

This app guides you through inspecting unfamiliar spaces for hidden cameras using visual lens detection, nearby device scanning, and magnetic field readings. It provides structured checklists and on-device reports to help you make informed judgments about suspicious devices.

Highlights
  • Visual lens detection with multiple filters
  • Nearby device scanning (Bluetooth & Wi-Fi)
  • Magnetic field scanner
  • Guided inspection checklists
  • On-device scan reports
  • Training and tips for inspection
Features
Read full description

Inspect hotels, rentals, offices, and unfamiliar rooms with one clear, guided workflow. Hidden Camera Detector combines lens-reflection tools, nearby Bluetooth and Wi‑Fi scanning, magnetic-field readings, and a room-by-room checklist. Use each signal as part of a structured inspection designed to reduce guesswork and highlight what deserves a closer look. ONE WORKFLOW. MULTIPLE SIGNALS. LENS CHECK Use the live camera view and multiple filters to make reflections and possible lens glints easier to notice. Adjust exposure, switch cameras, control the flashlight, or use Color Cycle, Brightness Ramp, and Auto Sweep for different visual conditions. NEARBY DEVICES Use Radar to review Bluetooth devices with signal-strength bars, suspicious indicators, and signal-lost detection. Scan reachable addresses on the local Wi‑Fi network, view your local IP, and identify devices worth investigating. MAGNETIC FIELD Monitor live Bx, By, and Bz readings, total field strength in microtesla, and changes over time on a rolling chart to guide a closer inspection. GUIDED ROOM CHECK Choose a Quick, Balanced, or Thorough scan. Build a checklist around your location, room size, and lighting, then work area by area with progress tracking and practical tips for common hiding places. REPORTED LOCATIONS Explore a map of publicly reported hidden-camera incidents compiled from open online sources. PRIVATE BY DESIGN Lens detection does not record or send images. Permissions are requested only when needed: - Camera: Lens check - Bluetooth: Nearby-device scan - Local Network: Wi‑Fi scan - Notifications: Optional reminders - Location: Optional map position IMPORTANT Hidden Camera Detector makes the most of your phone's camera, Bluetooth, Wi‑Fi, and sensors to help you spot signs of hidden cameras. It is a practical first step for everyday checks, but it does not replace specialized detection equipment or a professional security inspection. Download Hidden Camera Detector and inspect your next space with a clearer, more repeatable process.

Screenshots

Radiator Calculator Pro4 screens
Hidden Camera Detector4 screens

Verdict

The call

The clearest difference is review sentiment: Hidden Camera Detector at 100% against Radiator Calculator Pro's 0%. Hidden Camera Detector also leads on monetization model (free vs paid) and update cadence (every 2 days vs every 3 months). 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. Radiator Calculator Pro sells 1 one-off in-app purchase and Hidden Camera Detector sells 9 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Radiator Calculator Pro ships an update every 3 months, Hidden Camera Detector every 2 days. The most recent releases landed on October 28, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 6 level
Radiator Calculator Pro versus Hidden Camera Detector: the parameters behind the verdict, then further details
ParameterRadiator Calculator ProHidden Camera Detector
PriceFreeFree
Rating—5.0 (6 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings—6 — better
Update frequencyEvery 3 monthsEvery 2 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationPaidFree — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.018.1 — better
Further details — not scored
Size16 MB66 MB
Age rating4+4+
DeveloperDigitalKind LtdArtur Karachev

Customer experience

Radiator Calculator Pro

Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Hidden Camera Detector

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Radiator Calculator Pro

One-time1
  • Radiator Calculator PRO$3.99
9 purchases

Hidden Camera Detector

Subscriptions7
  • Premium (1 Week)$6.997 Days
  • Premium (1 Week)3 Days trial$6.997 Days
  • Premium (1 Month)7 Days trial$7.991 Month
Show 4 more
  • Premium (1 Month)$7.991 Month
  • Premium (1 Year)$8.991 Year
  • Premium (1 Year)$34.991 Year
  • Premium (1 Year)3 Days trial$34.991 Year
One-time2
  • Premium (Lifetime)$11.99
  • Premium (Lifetime)$44.99

Questions

Is Radiator Calculator Pro free?
Radiator Calculator Pro is free to download, with in-app purchases available.
Is Hidden Camera Detector free?
Hidden Camera Detector is free to download, with in-app purchases available.
Do Radiator Calculator Pro or Hidden Camera Detector have ads?
Neither Radiator Calculator Pro nor Hidden Camera Detector shows ads.
Which is updated more often, Radiator Calculator Pro or Hidden Camera Detector?
Radiator Calculator Pro ships an update every 3 months, and Hidden Camera Detector every 2 days. Most recently, Radiator Calculator Pro was updated on October 28, 2026 and Hidden Camera Detector on October 30, 2026.

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