# RainSpot vs STP Viewer

The clearest difference is in-app purchases: RainSpot at none against STP Viewer's 3. STP Viewer's advantage is iOS requirement (13.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. STP Viewer sells 3 in-app purchases, starting at $1.99 per 7 days. RainSpot asks for nothing beyond the download.

## The numbers

| Metric | RainSpot | STP Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/stp-viewer-step-3d/id6770497525/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Monetization | — | Free with in-app purchases |
| Size | 31 MB | 44 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [RainSpot, LLC](https://appshunter.io/developer/1789522390) | [CODIGITAL SOLUTIONS](https://appshunter.io/developer/1829802387) |

## What reviewers say

### RainSpot

[App page](https://appshunter.io/ios/app/rainspot/id6740326129)

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

**In-app purchases:** none


### STP Viewer

[App page](https://appshunter.io/ios/app/stp-viewer-step-3d/id6770497525)

This application allows users to open and view large, complex 3D CAD files on their mobile devices. It supports standard STEP and STP file formats, offering smooth navigation and offline accessibility for professionals and enthusiasts alike.

**Highlights:** Open STP and STEP files, Fluid 3D navigation (orbit, pan, zoom), Instant file loading from various sources, View complex assemblies, Offline accessibility, Battery and RAM efficient, Supports files from major CAD software

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Access | $1.99 | per 7 days |
| Pro Access | $4.99 | per month |
| Pro Access | $9.99 | per year |


## Frequently asked questions

### Is RainSpot free?

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

### Is STP Viewer free?

STP Viewer is free to download, with in-app purchases available.

### Do RainSpot or STP Viewer have ads?

Neither RainSpot nor STP Viewer 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.*