SimpleFFT vs SysX Buddy
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SimpleFFT
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This app can easily analyze the frequency of sound. For the sound of the recording file recorded at each refresh time interval, FFT is executed and displayed for the four voices collected one after another at each refresh interval.
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: SimpleFFT at Free against SysX Buddy's $4.99. SysX Buddy's advantage is in-app purchases (none vs 1) and ads (none vs shown). On 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
SimpleFFT is free to download; SysX Buddy costs $4.99 up front. SimpleFFT sells 1 one-off in-app purchase. SysX Buddy asks for nothing beyond the download.
SimpleFFT ships an update every 18 months, SysX Buddy every 2 months. The most recent releases landed on August 28, 2026 and September 5, 2026 respectively.
| Parameter | SimpleFFT | SysX Buddy |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | — | 5.0 (3 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | Every 18 months | Every 2 months — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | — | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | HIROFUMI MARUO | Ryouta Kira |
In-app purchases
SimpleFFT
- Premium Functions$0.49
SysX Buddy
No in-app purchases
