# VistaCCD vs NVH Source Locator

The clearest difference is in-app purchases: VistaCCD at none against NVH Source Locator's 1. VistaCCD also leads on iOS requirement (8.0 vs 15.0). NVH Source Locator's advantage is update cadence (every 4 days vs fortnightly). On price, ads and device support there is nothing between them.

Both are free to download. NVH Source Locator sells 1 one-off in-app purchase. VistaCCD asks for nothing beyond the download.

VistaCCD ships an update fortnightly, NVH Source Locator every 4 days. The most recent releases landed on September 29, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | VistaCCD | NVH Source Locator |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 4 days** |
| Monetization | Free | — |
| Size | 7 MB | 12 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kal Designs Ltd](https://appshunter.io/developer/521728838) | [Roman Franta](https://appshunter.io/developer/1895145157) |

## What reviewers say

### VistaCCD

[App page](https://appshunter.io/ios/app/vistaccd/id521728835)

This utility app assists engineers in the preliminary design of turbo compressor impellers. It calculates key dimensions and efficiency based on user-defined performance targets and inlet conditions, offering visual feedback for optimization.

**Highlights:** Preliminary turbo compressor impeller design, Key dimensions and efficiency calculation, Meanline design calculation, Reynolds number and tip clearance correction, Visual feedback for optimization, 2D impeller sketch

**Features:** macOS Compatibility

**In-app purchases:** none


### NVH Source Locator

[App page](https://appshunter.io/ios/app/nvh-source-locator/id6763063429)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NVH Source Locator Pro | $19.99 | one-time |


## Frequently asked questions

### Is VistaCCD free?

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

### Is NVH Source Locator free?

NVH Source Locator is free to download, with in-app purchases available.

### Do VistaCCD or NVH Source Locator have ads?

Neither VistaCCD nor NVH Source Locator shows ads.

### Which is updated more often, VistaCCD or NVH Source Locator?

VistaCCD ships an update fortnightly, and NVH Source Locator every 4 days. Most recently, VistaCCD was updated on September 29, 2026 and NVH Source Locator on October 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*