# YDIS Smart vs Ask Nereus

The clearest difference is update cadence: YDIS Smart at every 3 months against Ask Nereus's every 7 months. YDIS Smart also leads on iOS requirement (12.0 vs 15.0). 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.

YDIS Smart ships an update every 3 months, Ask Nereus every 7 months. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | YDIS Smart | Ask Nereus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (16 ratings)](https://appshunter.io/ios/app/ydis-smart/id1062728896/reviews)** | — |
| Number of ratings | **16** | — |
| Positive reviews | 42.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 7 months |
| Monetization | Free | — |
| Size | 7 MB | 1 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Yamaha Motor Co., Ltd.](https://appshunter.io/developer/337268490) | [Grant Newhouse](https://appshunter.io/developer/1884738606) |

## What reviewers say

### YDIS Smart

[App page](https://appshunter.io/ios/app/ydis-smart/id1062728896)

This application allows authorized Yamaha dealers to access diagnostic functions for Yamaha outboard motors on their smartphones. It requires a dedicated adapter and registration information for the PC version of the diagnostic system.

**Highlights:** Perform inspections of Yamaha outboard motors, Access self-diagnostic system functions, Use on smartphones, Requires dedicated adapter, Requires YDIS PC version registration, Enable speedometer display with GPS

**Features:** Vision Pro support

**In-app purchases:** none


### Ask Nereus

[App page](https://appshunter.io/ios/app/ask-nereus/id6760505976)

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

**In-app purchases:** none


## Frequently asked questions

### Is YDIS Smart free?

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

### Is Ask Nereus free?

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

### Do YDIS Smart or Ask Nereus have ads?

Neither YDIS Smart nor Ask Nereus shows ads.

### Which is updated more often, YDIS Smart or Ask Nereus?

YDIS Smart ships an update every 3 months, and Ask Nereus every 7 months. Most recently, YDIS Smart was updated on October 24, 2026 and Ask Nereus on October 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.*