# CIDR vs SysX Buddy

The clearest difference is price: CIDR at Free against SysX Buddy's $4.99. CIDR also leads on update cadence (every 3 weeks vs every 2 months). SysX Buddy's advantage is in-app purchases (none vs 1) and ratings volume (3 vs 1). On rating, ads and device support there is nothing between them.

CIDR is free to download; SysX Buddy costs $4.99 up front. CIDR sells 1 one-off in-app purchase. SysX Buddy asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for CIDR against 5.0 for SysX Buddy. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

CIDR ships an update every 3 weeks, SysX Buddy every 2 months. The most recent releases landed on June 30, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | CIDR | SysX Buddy |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/cidr/id1564239813/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/sysx-buddy/id6748940731/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | **Free** | Paid |
| Size | 23 MB | 1 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ao-system, Inc.](https://appshunter.io/developer/1338624340) | [Ryouta Kira](https://appshunter.io/developer/862984358) |

## What reviewers say

### CIDR

[App page](https://appshunter.io/ios/app/cidr/id1564239813)

This utility calculates IP address ranges from an IP address and subnet mask. It supports IPv4 calculations, including prefix display, address range counts, and bit notation. Useful for quick CIDR notation checks and subnet mask conversions.

**Highlights:** IP address range calculation, Subnet mask to CIDR conversion, IPv4 prefix display, Number of address ranges, Bit notation display, Quick reference table

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### SysX Buddy

[App page](https://appshunter.io/ios/app/sysx-buddy/id6748940731)

Manage MIDI System Exclusive messages on your iPhone or iPad. This utility allows you to send, receive, edit, and organize SysEx data for vintage synthesizers and sound modules. It supports external MIDI devices and BLE-MIDI, bridging classic instruments with modern mobile technology.

**Highlights:** Send and receive MIDI SysEx messages, File manager with folder creation, Hex viewer for SysEx data, Create and edit SysEx files, Support for USB MIDI devices, Support for BLE-MIDI, iCloud Drive integration

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CIDR free?

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

### Is SysX Buddy free?

SysX Buddy costs $4.99, with no in-app purchases.

### Which has better reviews, CIDR or SysX Buddy?

CIDR and SysX Buddy are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do CIDR or SysX Buddy have ads?

Neither CIDR nor SysX Buddy shows ads.

### Which is updated more often, CIDR or SysX Buddy?

CIDR ships an update every 3 weeks, and SysX Buddy every 2 months. Most recently, CIDR was updated on June 30, 2026 and SysX Buddy on September 5, 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.*