Navisizer vs CoolCalc Scan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Navisizer
This app helps size domestic hot water heating systems for residential and commercial use. It calculates operating costs, savings, and generates comprehensive job specifications for Navien NPE Series tankless water heaters.
- Residential system sizing
- Operating cost and savings calculation
- Commercial application sizing (ASHRAE Hunter Curve)
- Tankless and tankless with storage solutions
- Comprehensive job specification output
- Save, print, or email system specs
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NaviSizer is designed to assist with sizing of domestic hot water heating systems with Navien NPE Series tankless water heaters. For residential applications, NaviSizer offers system sizing, calculation of operating cost and savings, and provides a comprehensive output to be used as a job spec. For commercial applications, NaviSizer uses ASHREA Hunter Curve calculations to size a broad range of applications. Both tankless and tankless with storage solutions are offered along with a comprehensive system spec that can be saved, printed, or emailed.
CoolCalc Scan
Capture precise 3D room scans using your device's LiDAR sensor. Organize projects, integrate with a web platform for advanced visualization, and export models in industry-standard formats. Ideal for professionals needing accurate spatial data.
- Precise LiDAR scanning
- Detailed 3D model capture
- Project organization
- CoolCalc platform integration
- Industry-standard export formats
- Multi-room scanning
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Free Scanning — Paid Web Features This iOS app is a companion to CoolCalc. Scanning is free. To use your scan results for ACCA Manual J, Manual S, or Manual D calculations, you’ll need a separate paid subscription or single-project purchase in app.coolcalc.com, our web app. KEY FEATURES • Precise LiDAR Scanning Capture detailed 3D models of rooms with accurate measurements. Document walls, ceilings, windows, doors, and room geometry with professional-grade precision. • Project Organization Create projects for different properties or jobs. Scan multiple rooms and keep everything organized in one place. • CoolCalc Platform Integration Connect your scans with the CoolCalc web platform. Upload your models for advanced processing and visualization with interactive 3D viewers. • Professional Export Export your 3D models in industry-standard formats. Share scans with clients, colleagues, or use them in other professional tools. • Multi-Room Scanning Document entire properties efficiently. Scan room by room and combine them into complete building models. IDEAL FOR Perfect for HVAC professionals, contractors, architects, interior designers, and anyone who needs accurate spatial measurements for their work. REQUIREMENTS • iPhone or iPad with LiDAR sensor (iPhone 12 Pro and later, iPad Pro 2020 and later) • iOS 17.5 or later • Account required for platform integration features
Screenshots
Verdict
The clearest difference is update cadence: CoolCalc Scan at every 4 weeks against Navisizer's every 4 months. CoolCalc Scan also leads on rating (2.6 vs 2.4). Navisizer's advantage is review sentiment (13% vs 0%) and monetization model (free vs ad-supported). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
CoolCalc Scan holds the better App Store score, 2.6 against 2.4. Both are backed by a comparable volume of ratings — 26 and 7 respectively. Written reviews complicate that: 13% of Navisizer's written reviews are positive against 0% of CoolCalc Scan's, so the app with the better star average is not the one people write more warmly about.
Navisizer ships an update every 4 months, CoolCalc Scan every 4 weeks. The most recent releases landed on October 5, 2026 and October 1, 2026 respectively.
| Parameter | Navisizer | CoolCalc Scan |
|---|---|---|
| Price | Free | Free |
| Rating | 2.4 (26 ratings) | 2.6 (7 ratings) — better |
| Positive reviews | 12.5% of reviews — better | 0.0% of reviews |
| Number of ratings | 26 — better | 7 |
| Update frequency | Every 4 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.2 — better | 17.5 |
| Further details — not scored | ||
| Size | 21 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Navien | Cool Calc Inc. |
Customer experience
Navisizer
CoolCalc Scan
In-app purchases
Navisizer
No in-app purchases
CoolCalc Scan
No in-app purchases
Questions
Is Navisizer free?
Is CoolCalc Scan free?
Which has better reviews, Navisizer or CoolCalc Scan?
Do Navisizer or CoolCalc Scan have ads?
Which is updated more often, Navisizer or CoolCalc Scan?
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