# Thermal Light vs OCRBook

The clearest difference is iOS requirement: Thermal Light at 16.6 against OCRBook's 18.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Thermal Light costs $1.99 and OCRBook $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Thermal Light ships an update weekly, OCRBook every 8 days. The most recent releases landed on November 1, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Thermal Light | OCRBook |
| --- | --- | --- |
| Price | $1.99 | $1.99 |
| Rating | **[2.3 (6 ratings)](https://appshunter.io/ios/app/thermal-light/id476998738/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 8 days |
| Monetization | Paid | — |
| Size | 2 MB | 14 MB |
| Requires iOS | **16.6** | 18.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Crystal Clear Solutions](https://appshunter.io/developer/444062170) | [FiveStar AI](https://appshunter.io/developer/1872300274) |

## What reviewers say

### Thermal Light

[App page](https://appshunter.io/ios/app/thermal-light/id476998738)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### OCRBook

[App page](https://appshunter.io/ios/app/ocrbook/id6755219492)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Thermal Light free?

Thermal Light costs $1.99, with no in-app purchases.

### Is OCRBook free?

OCRBook costs $1.99, with no in-app purchases.

### Do Thermal Light or OCRBook have ads?

Neither Thermal Light nor OCRBook shows ads.

### Which is updated more often, Thermal Light or OCRBook?

Thermal Light ships an update weekly, and OCRBook every 8 days. Most recently, Thermal Light was updated on November 1, 2026 and OCRBook on November 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*