# Thermal Scope vs Iron Index

The clearest difference is in-app purchases: Thermal Scope at none against Iron Index's 1. Iron Index's advantage is iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Iron Index sells 1 one-off in-app purchase. Thermal Scope asks for nothing beyond the download.

## The numbers

| Metric | Thermal Scope | Iron Index |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Size | 18 MB | 45 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Software Shop](https://appshunter.io/developer/1288503758) | [Dylan Burrough](https://appshunter.io/developer/1873824273) |

## What reviewers say

### Thermal Scope

[App page](https://appshunter.io/ios/app/thermal-scope/id6755324605)

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

**In-app purchases:** none


### Iron Index

[App page](https://appshunter.io/ios/app/iron-index/id6759079356)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Iron Index Pro - Lifetime Access | $19.99 | one-time |


## Frequently asked questions

### Is Thermal Scope free?

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

### Is Iron Index free?

Iron Index is free to download, with in-app purchases available.

### Do Thermal Scope or Iron Index have ads?

Neither Thermal Scope nor Iron Index 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.*