Radiator Calculator Pro vs Phare Protect
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Calculate heating requirements
- Support for all room types
- Precise Watts and BTU output
- Unlimited room saving
- Intuitive user interface
- Dark mode support
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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.
Phare Protect
Monitor your home's safety with live, room-by-room insights from smart sensors. Get instant alerts for smoke, CO, air quality, and more, with 24-hour trend data and easy management of multiple properties.
- Room-by-room interactive floor plan
- Real-time sensor readings (smoke, CO, air quality)
- 24-hour trend graphs
- Instant push notifications for alerts
- Manage multiple homes
- Easy device setup
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Phare Protect — Smart Home Safety, At a Glance Phare Protect is the official companion app for your Phare smart sensors. It turns your home into a live, room-by-room view of the things that matter most: smoke, carbon monoxide, indoor air quality, temperature, and more. See your whole home, room by room An interactive floor plan shows where every Phare device is placed and the live status of each room at a glance. Swipe between rooms to focus on a single sensor, or zoom out for a full overview. Real-time monitoring Get instant readings for smoke, CO, indoor air quality, temperature, and noise. Each sensor is color-coded so you can read your home's status in a second. 24-hour trends Tap any sensor to view the last 24 hours as an interactive graph. Spot patterns in air quality, temperature, and noise over the course of the day. Instant alerts Push notifications arrive the moment something needs your attention — a smoke event, a CO spike, or a sudden drop in air quality. Open the app to see exactly which room and device triggered the alert. Multiple homes, one app Manage more than one property from a single account. Switch between your main residence, your holiday home, or a family member's place — each with its own devices, rooms, and history. Easy device setup Adding a new Phare takes a couple of minutes. The guided setup helps you name the device, choose its home, and assign it to a room. Designed for everyday life and built for the Phare ecosystem Phare Protect works with the Phare C1 and C1 Pro smart sensors. A Phare account and at least one Phare device are required. Bring your home's safety into a single, insightful view — wherever you are.
Screenshots
Verdict
The clearest difference is in-app purchases: Phare Protect at none against Radiator Calculator Pro's 1. Phare Protect also leads on update cadence (every 4 days vs every 3 months) and iOS requirement (15.1 vs 26.0). On price, ads 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
Both are free to download. Radiator Calculator Pro sells 1 one-off in-app purchase. Phare Protect asks for nothing beyond the download.
Radiator Calculator Pro ships an update every 3 months, Phare Protect every 4 days. Both last shipped on October 28, 2026.
| Parameter | Radiator Calculator Pro | Phare Protect |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 26.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 16 MB | 39 MB |
| Age rating | 4+ | 4+ |
| Developer | DigitalKind Ltd | Phare Labs Inc |
Customer experience
Radiator Calculator Pro
Phare Protect
In-app purchases
Radiator Calculator Pro
- Radiator Calculator PRO$3.99
Phare Protect
No in-app purchases
Questions
Is Radiator Calculator Pro free?
Is Phare Protect free?
Do Radiator Calculator Pro or Phare Protect have ads?
Which is updated more often, Radiator Calculator Pro or Phare Protect?
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