# D vs Thermal Imager

The clearest difference is iOS requirement: Thermal Imager at 11.0 against D's 13.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | D | Thermal Imager |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | — |
| Size | 47 MB | 51 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Shenzhen DiscoveryOpt Technology Co., Ltd.](https://appshunter.io/developer/1822511782) | [Changzhou Haoyi Technology Co.,Ltd.](https://appshunter.io/developer/6775329697) |

## What reviewers say

### D

[App page](https://appshunter.io/ios/app/d-vision/id6479838973)

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

**In-app purchases:** none


### Thermal Imager

[App page](https://appshunter.io/ios/app/thermal-imager/id6502282920)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is D free?

D is free to download, with no in-app purchases.

### Is Thermal Imager free?

Thermal Imager is free to download, with no in-app purchases.

### Do D or Thermal Imager have ads?

Neither D nor Thermal Imager shows ads.

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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.*