# VIPER EXPERT vs Spool Master

The clearest difference is in-app purchases: VIPER EXPERT at none against Spool Master's 2. VIPER EXPERT also leads on ads (none vs shown) and iOS requirement (10.1 vs 15.0). Spool Master's advantage is update cadence (every 4 days vs every 48 months). On price, rating, ratings volume and device support there is nothing between them.

Both are free to download. Spool Master sells 2 in-app purchases, starting at $1.99 per month. VIPER EXPERT asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for VIPER EXPERT against 5.0 for Spool Master. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

VIPER EXPERT ships an update every 48 months, Spool Master every 4 days. The most recent releases landed on September 12, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | VIPER EXPERT | Spool Master |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/viper-expert/id1486572441/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/spool-master/id6757678949/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 41.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 48 months | **Every 4 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 46 MB | 39 MB |
| Requires iOS | **10.1** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sergei Fetisov](https://appshunter.io/developer/1410631641) | [Sebastien Girod](https://appshunter.io/developer/1472154080) |

## What reviewers say

### VIPER EXPERT

[App page](https://appshunter.io/ios/app/viper-expert/id1486572441)

Connect to your dashcam via Wi-Fi to fully control its settings and view live footage. Browse, save, delete, and share photos and videos directly from your phone.

**Highlights:** Wi-Fi dashcam connection, Full device control, Live view streaming, Media browsing, Save and delete files, Share media via social networks

**Features:** macOS Compatibility

**In-app purchases:** none


### Spool Master

[App page](https://appshunter.io/ios/app/spool-master/id6757678949)

Manage your 3D printing filament stock with NFC tag reading/writing, inventory tracking, and smart shopping lists. Optimize expenses and reduce waste for hobbyists and professionals.

**Highlights:** NFC reading and writing for spool tags, Complete inventory management, Detailed statistics and value tracking, Automatic low stock alerts, Smart shopping list generation, Print settings configuration, Multi-device synchronization

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Spool Master Monthly | $1.99 | per month |
| Spool Master Yearly | $9.99 | per year |


## Frequently asked questions

### Is VIPER EXPERT free?

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

### Is Spool Master free?

Spool Master is free to download, with in-app purchases available.

### Which has better reviews, VIPER EXPERT or Spool Master?

VIPER EXPERT and Spool Master are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do VIPER EXPERT or Spool Master have ads?

Spool Master shows ads; VIPER EXPERT does not.

### Which is updated more often, VIPER EXPERT or Spool Master?

VIPER EXPERT ships an update every 48 months, and Spool Master every 4 days. Most recently, VIPER EXPERT was updated on September 12, 2026 and Spool Master on September 13, 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.*