# Installation Instructions vs Digital Service Assistant

The clearest difference is update cadence: Digital Service Assistant at every 4 months against Installation Instructions's every 11 months. Installation Instructions's advantage is iOS requirement (10.0 vs 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.

Installation Instructions ships an update every 11 months, Digital Service Assistant every 4 months. The most recent releases landed on September 21, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Installation Instructions | Digital Service Assistant |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/installation-instructions/id720681644/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 4 months** |
| Monetization | Free | — |
| Size | 12 MB | 36 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) | [Bosch Rexroth AG](https://appshunter.io/developer/417376585) |

## What reviewers say

### Installation Instructions

[App page](https://appshunter.io/ios/app/installation-instructions/id720681644)

This app provides visual guidance for the correct installation of various seals. It uses film, animation, and documentation to simulate expert installation, covering hydraulic, radial, and mechanical face seals, along with visual inspection and common mistakes.

**Highlights:** Hydraulic seal installation (rod/piston), Radial oil seal installation, Mechanical face seal installation, Visual inspection guidance, Common installation mistakes, Use of assembly tools

**Features:** macOS Compatibility

**In-app purchases:** none


### Digital Service Assistant

[App page](https://appshunter.io/ios/app/digital-service-assistant/id1454347756)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Installation Instructions free?

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

### Is Digital Service Assistant free?

Digital Service Assistant is free to download, with no in-app purchases.

### Do Installation Instructions or Digital Service Assistant have ads?

Neither Installation Instructions nor Digital Service Assistant shows ads.

### Which is updated more often, Installation Instructions or Digital Service Assistant?

Installation Instructions ships an update every 11 months, and Digital Service Assistant every 4 months. Most recently, Installation Instructions was updated on September 21, 2026 and Digital Service Assistant on September 19, 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.*