# Danley Tools vs SISO Calculator

The clearest difference is rating: SISO Calculator at 5.0 against Danley Tools's 4.0. SISO Calculator also leads on update cadence (every 5 weeks vs every 36 months) and ratings volume (3 vs 1). On price, review sentiment, ads and in-app purchases there is nothing between them.

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

SISO Calculator holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Danley Tools ships an update every 36 months, SISO Calculator every 5 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | Danley Tools | SISO Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/danley-tools/id1538456260/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/siso-calculator/id1548141101/reviews)** |
| Number of ratings | 1 | **3** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 36 months | **Every 5 weeks** |
| Monetization | Free | Free |
| Size | 7 MB | 4 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [sebastian rivas](https://appshunter.io/developer/506708461) | [Deft Dynamics](https://appshunter.io/developer/1288783778) |

## What reviewers say

### Danley Tools

[App page](https://appshunter.io/ios/app/danley-tools/id1538456260)

This app provides essential calculators and reference materials for audio engineering professionals and enthusiasts. It offers tools to assist with various calculations needed in sound system design and analysis.

**Highlights:** Audio engineering calculators, Reference materials, Sound system design tools, Analysis assistance

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

**In-app purchases:** none


### SISO Calculator

[App page](https://appshunter.io/ios/app/siso-calculator/id1548141101)

This app helps engineers and students understand System Dynamics and Controls. It offers an intuitive interface to quickly analyze controller and plant interactions in both time and frequency domains.

**Highlights:** System Dynamics analysis, Controls engineering, Intuitive interface, Time domain analysis, Frequency domain analysis, Controller interaction visualization

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Danley Tools free?

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

### Is SISO Calculator free?

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

### Which has better reviews, Danley Tools or SISO Calculator?

SISO Calculator is rated higher. Danley Tools averages 4.0 out of 5 from 1 ratings, while SISO Calculator averages 5.0 from 3 ratings.

### Do Danley Tools or SISO Calculator have ads?

Neither Danley Tools nor SISO Calculator shows ads.

### Which is updated more often, Danley Tools or SISO Calculator?

Danley Tools ships an update every 36 months, and SISO Calculator every 5 weeks. Most recently, Danley Tools was updated on November 3, 2026 and SISO Calculator on November 3, 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.*