Comparison

Unit Converter vs Thermal Viewer

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

Head to head
About

Unit Converter

Easily convert measurements between various units with a clean and intuitive interface. Supports over 20 categories including length, mass, temperature, and volume.

Highlights
  • Converts between units
  • Supports 20+ categories
  • Clean interface design
  • Intuitive navigation
  • Free to use
Features
Read full description

A simple but elegant Free Unit Converter. Convert the numbers from one unit to another. The goal of this application to make it simple to use with clean interface design.  Application supports 20 different categories which includes :  * Acceleration * Angle * Area * Bytes * Current * Energy * Force * Illumination * Inductance * Length * Magnitude * Mass * Power * Pressure * Radiation * Temperature * Time * Torque * Velocity * Volume Tip: Quickly move to the different category by tapping on category name.

About

Thermal Viewer

Analyze radiometric thermal images directly on your iPhone, iPad, or Mac. This app supports various thermal image formats and offers detailed temperature analysis, including spot, box, and ellipse measurements. It allows for live re-analysis and export of data and settings, all while keeping your images private and offline.

Highlights
  • Analyze radiometric thermal images
  • Supports multiple thermal file formats
  • Tap to read exact temperature
  • Add spot, box, ellipse, and line measurements
  • Live re-analysis with adjustable parameters
  • Visible-light blend and MSX-style overlay
  • Export temperature matrix to CSV
  • Batch export of images and settings
Features
Read full description

Thermal Viewer opens and analyzes radiometric thermal images right on your iPhone, iPad, and Mac. No Windows PC, no camera accessory, and no account. Searching for "FLIR Tools for Mac" or a SmartView alternative? This is the native app you have been missing. FLIR discontinued its Mac software and Fluke's mobile viewer is no longer maintained. Thermal Viewer fills that gap, fully offline. WORKS WITH • FLIR radiometric JPEG: E-series, T-series, Cx, FLIR ONE, CAT phones • Fluke IS2 files • Radiometric TIFF (ResearchIR, Vue / Duo Pro R) • InfiRay / P2 Pro thermal JPEG • DJI thermal JPEG (image and capture parameters) • Plain thermal JPEGs EVERY PIXEL IS A TEMPERATURE Tap anywhere to read the exact temperature. Add spot, box, ellipse and line measurements with min / avg / max, and Delta-T between any two of them. PROFESSIONAL ANALYSIS • 8 color palettes plus your camera's own palette • Level/span with histogram, isotherms, automatic hot and cold markers • Live re-analysis: change emissivity, reflected temperature and distance, and temperatures recompute instantly • Visible-light blend, picture-in-picture, and MSX-style edge overlay • °C / °F / K • Full camera, lens, GPS and parameter inspector EXPORT & BATCH • Export the full temperature matrix to CSV • Export rendered images (PNG) and reproducible analysis settings (JSON) • Hotspot Triage: scan a whole folder and flag every image above your threshold • Batch export PRIVATE BY DESIGN Everything runs on your device. Your images never leave your phone: no cloud, no account, no tracking. Thermal Viewer is an independent app and is not affiliated with, endorsed by, or sponsored by FLIR, Teledyne, Fluke, DJI, or InfiRay. Brand names are used only to indicate supported file formats. Privacy Policy: https://rush.tools/privacy Terms of Use: https://rush.tools/terms

Screenshots

Unit Converter4 screens
Thermal Viewer4 screens

Verdict

The call

The clearest difference is review sentiment: Thermal Viewer at 50% against Unit Converter's 0%. Thermal Viewer also leads on rating (5.0 vs 1.0) and update cadence (every 6 days vs every 28 months). Unit Converter's advantage is in-app purchases (none vs 3) and iOS requirement (11.0 vs 15.0). On price, ratings volume, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Thermal Viewer sells 3 in-app purchases, starting at $4.99 per 7 days. Unit Converter asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Thermal Viewer holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews point the same way: 0% of Unit Converter's written reviews are positive against 50% of Thermal Viewer's.

UpkeepUpdate frequency

Unit Converter ships an update every 28 months, Thermal Viewer every 6 days. The most recent releases landed on October 11, 2026 and October 28, 2026 respectively.

Scorecard6 real differences · 4 level
Unit Converter versus Thermal Viewer: the parameters behind the verdict, then further details
ParameterUnit ConverterThermal Viewer
PriceFreeFree
Rating1.0 (1 ratings)5.0 (2 ratings) — better
Positive reviews0.0% of reviews50.0% of reviews — better
Number of ratings12 — better
Update frequencyEvery 28 monthsEvery 6 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS11.0 — better15.0
Further details — not scored
Size30 MB35 MB
Age rating4+4+
DeveloperDipen PatelRush Tools LLC

Customer experience

Unit Converter

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Thermal Viewer

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

Unit Converter

No in-app purchases

3 purchases

Thermal Viewer

Subscriptions2
  • Pro Weekly3 Days trial$4.997 Days
  • Pro Yearly$29.991 Year
One-time1
  • Lifetime Access$49.99

Questions

Is Unit Converter free?
Unit Converter is free to download, with no in-app purchases.
Is Thermal Viewer free?
Thermal Viewer is free to download, with in-app purchases available.
Which has better reviews, Unit Converter or Thermal Viewer?
Thermal Viewer is rated higher. Unit Converter averages 1.0 out of 5 from 1 ratings, while Thermal Viewer averages 5.0 from 2 ratings.
Do Unit Converter or Thermal Viewer have ads?
Neither Unit Converter nor Thermal Viewer shows ads.
Which is updated more often, Unit Converter or Thermal Viewer?
Unit Converter ships an update every 28 months, and Thermal Viewer every 6 days. Most recently, Unit Converter was updated on October 11, 2026 and Thermal Viewer on October 28, 2026.

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