# PIAZZA Database vs Army Knots

The clearest difference is review sentiment: Army Knots at 89% against PIAZZA Database's 50%. Army Knots also leads on update cadence (every 6 weeks vs every 32 months) and iOS requirement (15.0 vs 17.6). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PIAZZA Database ships an update every 32 months, Army Knots every 6 weeks. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | PIAZZA Database | Army Knots |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (1.1K ratings)](https://appshunter.io/ios/app/army-knots/id6446508160/reviews)** |
| Number of ratings | — | **1.1K** |
| Positive reviews | 50.0% of reviews | **89.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 32 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 19 MB | 47 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [sabitori works](https://appshunter.io/developer/447072101) | [Nynix](https://appshunter.io/developer/425939481) |

## What reviewers say

### PIAZZA Database

[App page](https://appshunter.io/ios/app/piazza-database/id447072098)

Access essential information about PIAZZA vehicles. This app provides a yearbook, detailed specifications for six models, and a VIN plate decoder. All data is stored locally, requiring no internet connection for use.

**Highlights:** Yearbook (chronological table), Specification of 6 models, VIN plate decoder, Local data storage, Offline functionality

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

**In-app purchases:** none


### Army Knots

[App page](https://appshunter.io/ios/app/army-knots/id6446508160)

Master essential knots for military training and survival with interactive 3D models and step-by-step instructions. This app provides offline access to a comprehensive knot library, allowing users to track their progress and easily find the knots they need.

**Highlights:** Extensive knot library, Rotatable 3D knot models, Step-by-step instructions, Offline access, Mastered knots tracking, Knot search functionality

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

**In-app purchases:** none

**What reviewers like**

- 👍 Intuitive UI
- 🚀 Clear instructions
- 🚀 Helpful animations
- 👍 Practical knots
- 👍 Easy to understand

**What reviewers complain about**

- 🐛 Can be confusing for beginners
- 💡 Needs more knot options

**Reported bugs**

- Some users had trouble tightening the knots

**Requested features**

- Add more knot options
- Ability to practice tying knots on-screen
- Provide more background information on each knot


## Frequently asked questions

### Is PIAZZA Database free?

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

### Is Army Knots free?

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

### Do PIAZZA Database or Army Knots have ads?

Neither PIAZZA Database nor Army Knots shows ads.

### Which is updated more often, PIAZZA Database or Army Knots?

PIAZZA Database ships an update every 32 months, and Army Knots every 6 weeks. Most recently, PIAZZA Database was updated on October 23, 2026 and Army Knots on October 25, 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.*