Comparison

Temp Master vs ManualJ Lite

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

Head to head
About

Temp Master

This utility app enhances thermal imaging capabilities for compatible Thermal Master devices, offering precise temperature detection and advanced image analysis. It allows users to view, save, and export thermal data offline, with features like digital zoom and improved resolution for various inspection tasks.

Highlights
  • High-accuracy temperature detection
  • Enhanced infrared resolution
  • Offline data viewing and export
  • Up to 15x digital zoom
  • Reduced background noise
  • Long battery life optimization
Features
Read full description

Temp Master This app is exclusively compatible with the following Thermal Master devices: P1 / P2 Pro / P3. Thermal Master offers two main series of thermal imaging devices—Temp Master (traditional smartphone thermal cameras) and Thermal Master (thermal monoculars)—covering a wide range of use cases from home temperature monitoring and industrial inspections to long-range (up to 1500 meters) outdoor night vision. What's new in this version: Resolved compatibility issues with the X³ super-resolution algorithm on some models. Now fully supports enhanced infrared resolution of 512×384. P2 now supports high-accuracy temperature detection within ±2.7℉ (±1.5℃). With an upgraded IQ+ precision algorithm, temperature readings for HVAC systems, electrical circuits, PCB diagnostics, and automotive inspections are now even more reliable. The P2 pioneered ultra-low power consumption in thermal imaging—just 0.3W. We've further optimized the algorithm, battery life can now reach 5–7 hours or more. Upgraded professional data analysis software: view, save, and export images and temperature data even offline. Enhanced the Razor X image algorithm, reducing background noise by approximately 20% and achieving a frame rate of 25Hz, ensuring smooth performance even during fast movements. All Thermal Master devices now support up to 15x digital zoom for pinpoint accuracy when locating faults. As a global leader in smartphone thermal imaging, Thermal Master is committed to creating smarter and sharper thermal cameras. We hold the largest number of smartphone thermal imaging patents worldwide and offer lifetime free software updates for all products.

About

ManualJ Lite

Features
Read full description

ManualJ Lite is a fast, offline heating and cooling load estimator for houses. Enter the building, pick the climate zone, and read the cooling load, the heating load and the equipment size in seconds. WHAT IT CALCULATES Cooling load (BTU/h), itemised: - Walls, ceiling, window conduction and window solar gain - Internal gains, ventilation and infiltration - Tons, and the next nominal size at or above the load Heating load (BTU/h), itemised: - Walls, ceiling and windows - Ventilation and infiltration INPUTS - 8 IECC climate zones and 16 California Title 24 climate zones, with outdoor design temperatures you can edit for your location - Separate indoor setpoints for cooling and heating - Floor area, ceiling height, window area and occupants - Wall and ceiling insulation, selected separately - Window type, or the U-factor and SHGC from the NFRC label DOCUMENTED SIZING REPORT (IN-APP PURCHASE, PER REPORT) A clean, signable PDF of the estimate for proposals, customer files and job folders: every input, each load component, the formulas with your numbers substituted, where the design temperatures come from, and signature lines. Preview the whole report before you buy. A purchased report can be exported again for the same house at no extra charge. GOOD TO KNOW - This is a simplified whole-house block load on a single-storey, square footprint. It is not ACCA Manual J and the report is not a permit document. Where a permit, rebate programme or certification requires ACCA Manual J, use ACCA-approved software. - Not calculated: basement, slab and floor losses; duct gains and losses. - Works completely offline. No account or login required.

Screenshots

Temp Master4 screens
ManualJ Lite4 screens

Verdict

The call

The clearest difference is price: Temp Master at Free against ManualJ Lite's $4.99. Temp Master also leads on in-app purchases (none vs 1) and iOS requirement (11.0 vs 17.0). On update cadence, 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

Temp Master is free to download; ManualJ Lite costs $4.99 up front. ManualJ Lite sells 1 one-off in-app purchase. Temp Master asks for nothing beyond the download.

UpkeepUpdate frequency

Temp Master ships an update every 5 weeks, ManualJ Lite every 6 weeks. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
Temp Master versus ManualJ Lite: the parameters behind the verdict, then further details
ParameterTemp MasterManualJ Lite
PriceFree — better$4.99
Rating3.1 (14 ratings) — better—
Positive reviews40.0% of reviews—
Number of ratings14 — better—
Update frequencyEvery 5 weeks — betterEvery 6 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.0 — better17.0
Further details — not scored
Size43 MB1 MB
Age rating4+4+
DeveloperThermal Master Technology Co.,Ltd.Shanghai Sheyuan Network Technology Co., Ltd.

In-app purchases

None

Temp Master

No in-app purchases

1 purchases

ManualJ Lite

One-time1
  • Documented Sizing Report$19.99

Questions

Is Temp Master free?
Temp Master is free to download, with no in-app purchases.
Is ManualJ Lite free?
ManualJ Lite costs $4.99, and also offers in-app purchases.
Do Temp Master or ManualJ Lite have ads?
Neither Temp Master nor ManualJ Lite shows ads.
Which is updated more often, Temp Master or ManualJ Lite?
Temp Master ships an update every 5 weeks, and ManualJ Lite every 6 weeks. Most recently, Temp Master was updated on November 4, 2026 and ManualJ Lite on October 31, 2026.

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