Comparison

Navisizer vs CoolCalc Scan

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

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

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.

Highlights
  • Precise LiDAR scanning
  • Detailed 3D model capture
  • Project organization
  • CoolCalc platform integration
  • Industry-standard export formats
  • Multi-room scanning
Features
Read full description

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

Navisizer1 screens
CoolCalc Scan3 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
Navisizer versus CoolCalc Scan: the parameters behind the verdict, then further details
ParameterNavisizerCoolCalc Scan
PriceFreeFree
Rating2.4 (26 ratings)2.6 (7 ratings) — better
Positive reviews12.5% of reviews — better0.0% of reviews
Number of ratings26 — better7
Update frequencyEvery 4 monthsEvery 4 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterAd-supported
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.2 — better17.5
Further details — not scored
Size21 MB11 MB
Age rating4+4+
DeveloperNavienCool Calc Inc.

Customer experience

Navisizer

All ratings26 ratings
Positive34.6%
Neutral0.0%
Negative65.4%
Written reviews16 reviews
Positive12.5%
Neutral0.0%
Negative87.5%

CoolCalc Scan

All ratings7 ratings
Positive28.6%
Neutral14.3%
Negative57.1%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Navisizer

No in-app purchases

None

CoolCalc Scan

No in-app purchases

Questions

Is Navisizer free?
Navisizer is free to download, with no in-app purchases.
Is CoolCalc Scan free?
CoolCalc Scan is free to download, with no in-app purchases.
Which has better reviews, Navisizer or CoolCalc Scan?
CoolCalc Scan is rated higher. Navisizer averages 2.4 out of 5 from 26 ratings, while CoolCalc Scan averages 2.6 from 7 ratings.
Do Navisizer or CoolCalc Scan have ads?
Neither Navisizer nor CoolCalc Scan shows ads.
Which is updated more often, Navisizer or CoolCalc Scan?
Navisizer ships an update every 4 months, and CoolCalc Scan every 4 weeks. Most recently, Navisizer was updated on October 5, 2026 and CoolCalc Scan on October 1, 2026.

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