Comparison

Thermal Viewer vs CoilTrail

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

Head to head
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 FLIR discontinued its Mac software and Fluke's mobile viewer is no longer maintained.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

About

CoilTrail

This app helps metal detectorists log their finds and map their search areas. It records your route, logs treasure locations with photos and depth, and offers advanced mapping features. Analyze your findings and equipment performance to improve your treasure hunting success.

Highlights
  • GPS route tracking
  • Log finds with photos and depth
  • 3D LiDAR and Hillshade maps
  • Advanced soil and topography maps
  • Distance and area measuring tools
  • Metal detecting logbook and stats
  • Landowner permission logging
  • Export findings to CSV/PDF
Features
Read full description

Welcome to CoilTrail, the ultimate metal detector log and relic hunting app. Whether you are a weekend hobbyist or a seasoned professional, this complete metal detecting diary is your essential tool for GPS treasure hunting. Stop relying on your memory and start mapping your success! - Detectorist's Route Tracker Never search the same empty ground twice! Our smart GPS tracker records your exact walking path while you swing. Simply keep the app open or use our handy screen-awake feature, and save your sweeping routes directly to the map. - Detector Finds Map & Treasure Find Recorder Log every coin, relic, and piece of jewelry exactly where you dug it. Add photos, depth, and custom color pins to build your personal detector finds map. Categorize your trips into folders for easy browsing. - 3D Showcase & Augmented Reality (Pro/Cloud) Bring your finds to life! Inspect your treasures in a 3D vitrine, easily remove photo backgrounds, or import true 3D models (.glb/.gltf). Use the AR view to explore your saved finds directly through your camera in the real world. - 3D LiDAR & Hillshade Maps (Pro) Uncover hidden terrain features like old riverbeds, sunken paths, and ancient foundations. Access global high-resolution 3D LiDAR and Hillshade maps. Use the interactive opacity slider to blend the 3D shadows perfectly with your base map! - Advanced Soil Maps & Topography (Pro) Identify the best grounds for old settlements! Access dynamic USGS geological maps in the United States and GTK soil maps in Finland to analyze ground types (sand, clay, bedrock) directly under your feet. - Distance & Area Measuring Tools (Pro) Measure exact distances and field areas directly on the map. Perfect for planning your search grids and estimating the size of potential hunting grounds before you walk. - Metal Detecting Logbook & Stats (Pro) Keep a detailed history of your equipment and target ID statistics. The perfect coinshooting journal for analyzing which detector, coil, and settings work best for specific items. - Landowner Permissions (Pro) Easily save landowner contact details and permission boundaries directly on the map. Always know whose land you are on and who to call. - Cloud Sync & Desktop Web Access (Cloud) Back up your entire collection—including photos, routes, folders, and landowner notes—securely to the cloud. Seamlessly restore your data when switching phones, and plan your next hunts or browse your finds on a big screen using the CoilTrail Web version on your computer! - Export & Backup (Pro) Export your finding reports and session data to CSV or JSON files. Keep your valuable personal data safe with easy backup options. Turn your smartphone into the most powerful relic hunting app available. Download CoilTrail today and start building your personal treasure map! Terms of Use (EULA) & Privacy Policy: https://coiltrail.com/tietosuoja

Screenshots

Thermal Viewer4 screens
CoilTrail4 screens

Verdict

The call

Thermal Viewer and CoilTrail are too close to call on the numbers: across 9 compared parameters — price, rating, ratings volume and update cadence among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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 and CoilTrail sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Thermal Viewer against 5.0 for CoilTrail. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

Thermal Viewer ships an update every 6 days, CoilTrail weekly. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

ScorecardNo meaningful differences
Thermal Viewer versus CoilTrail: the parameters behind the verdict, then further details
ParameterThermal ViewerCoilTrail
PriceFreeFree
Rating5.0 (2 ratings)5.0 (1 ratings)
Positive reviews50.0% of reviews—
Number of ratings2 — better1
Update frequencyEvery 6 days — betterWeekly
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size35 MB90 MB
Age rating4+4+
DeveloperRush Tools LLCANTTI-PEKKA DAVIDSSON

Customer experience

Thermal Viewer

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

CoilTrail

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

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
3 purchases

CoilTrail

Subscriptions3
  • CoilTrail Pro monthly7 Days trial$3.991 Month
  • CoilTrail Cloud & Web$4.991 Month
  • CoilTrail Pro Yearly7 Days trial$34.991 Year

Questions

Is Thermal Viewer free?
Thermal Viewer is free to download, with in-app purchases available.
Is CoilTrail free?
CoilTrail is free to download, with in-app purchases available.
Which has better reviews, Thermal Viewer or CoilTrail?
Thermal Viewer and CoilTrail are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.
Do Thermal Viewer or CoilTrail have ads?
Neither Thermal Viewer nor CoilTrail shows ads.
Which is updated more often, Thermal Viewer or CoilTrail?
Thermal Viewer ships an update every 6 days, and CoilTrail weekly. Most recently, Thermal Viewer was updated on October 28, 2026 and CoilTrail on October 25, 2026.

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