Thermal Light vs LotusScreen
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Thermal Light
This app measures the temperature of extremely hot objects by analyzing the light they emit. It's designed for users working with materials like iron, steel, and copper, offering a cost-effective alternative to specialized thermometers.
- Measures temperatures from 1000F to 2700F
- Uses black body radiation analysis
- Calibrated against certified IR thermometer
- Cost-effective alternative to IR thermometers
- Supports iron, steel, and ceramics
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Thermal Light is the first of its kind app that uses black body radiation of an object (iron/steel, copper, ceramics) to determine temperatures between 1000F and 2700F. Very hot objects irradiate light; the app uses this light to determine the temperature between 1000 and 2700F. The app has been calibrated against a certified IR thermometer. Why spend $900 for an IR or optical thermometer when you can convert your iPhone to do the same thing? This is great for knowing the temperature of your steel for working. Temperature increments are 50F. Please go to support website for more details at http://houseofficer.com/forgingtemperature
LotusScreen
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该应用程序可以控制灯的颜色和亮度。
Screenshots
Verdict
The clearest difference is price: LotusScreen at Free against Thermal Light's $1.99. LotusScreen also leads on iOS requirement (12.0 vs 16.6). On update cadence, 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
LotusScreen is free to download; Thermal Light costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly weekly. The most recent releases landed on September 8, 2026 and September 17, 2026 respectively.
| Parameter | Thermal Light | LotusScreen |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 2.6 (5 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Weekly | Weekly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 16.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | Crystal Clear Solutions | ETK |
In-app purchases
Thermal Light
No in-app purchases
LotusScreen
No in-app purchases
Questions
Is Thermal Light free?
Is LotusScreen free?
Do Thermal Light or LotusScreen have ads?
Which is updated more often, Thermal Light or LotusScreen?
Other comparisons
