CIDR vs SysX Buddy
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CIDR
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.
- IP address range calculation
- Subnet mask to CIDR conversion
- IPv4 prefix display
- Number of address ranges
- Bit notation display
- Quick reference table
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Calculate the IP address range from the IP address and subnet mask. It can be used to calculate IPv4 addresses, including prefix display, number of address ranges, and bit notation. CIDR calculation, when you want to check CIDR notation quickly. To convert subnet mask to CIDR notation. It can also be used as a quick reference table for subnet masks. Bit notation is also available, so it is suitable for learning IPv4.
SysX Buddy
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.
- 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
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Turn your iPhone or iPad into a dedicated SysEx manager. A reliable companion for your vintage MIDI gear. SysX Buddy is a straightforward and powerful app for sending, receiving, editing, and managing MIDI System Exclusive (SysEx) messages. SysEx messages were widely used in the 1980s and 1990s by classic synthesizers and sound modules. SysX Buddy helps bridge the gap between these vintage instruments and your modern iPhone or iPad. Key Features - Send and receive MIDI SysEx messages - Simple file manager with folder creation - View SysEx data in a hex viewer - Create and edit SysEx files in hex format - Send a dump request message when recording - Support for external MIDI devices (USB MIDI) - Support for BLE-MIDI (Bluetooth Low Energy) - Save files anywhere on your device --- with fully customizable folder locations, including iCloud Drive. Note that: - There might be some communication issues on iOS/iPadOS 14. - The application and description contain AI-generated contents. - The data in the screenshot are not included by the application.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | CIDR | SysX Buddy |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | 5.0 (1 ratings) | 5.0 (3 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 3 — better |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 23 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | ao-system, Inc. | Ryouta Kira |
Customer experience
CIDR
SysX Buddy
In-app purchases
CIDR
- Remove Ads$1.99
SysX Buddy
No in-app purchases









