# Recorder Duet vs isfizz

The clearest difference is update cadence: isfizz at every 3 weeks against Recorder Duet's every 20 months. Recorder Duet's advantage is price ($0.99 vs $2.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Recorder Duet costs $0.99 and isfizz $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Recorder Duet ships an update every 20 months, isfizz every 3 weeks. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Recorder Duet | isfizz |
| --- | --- | --- |
| Price | **$0.99** | $2.99 |
| Rating | — | **[4.7 (14 ratings)](https://appshunter.io/ios/app/isfizz/id6470708963/reviews)** |
| Number of ratings | — | **14** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 3 weeks** |
| Monetization | — | Paid |
| Size | 94 MB | 6 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [masafumi sasaki](https://appshunter.io/developer/1016775706) | [Ryouta Kira](https://appshunter.io/developer/862984358) |

## What reviewers say

### Recorder Duet

[App page](https://appshunter.io/ios/app/recorder-duet/id1267676682)

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

**In-app purchases:** none


### isfizz

[App page](https://appshunter.io/ios/app/isfizz/id6470708963)

This app plays SFZ files, an open format for sampled sound instruments. It supports various audio file formats, MIDI, and Scala tuning files. It also functions as an Audio Unit Extension (AUv3) for use with other music apps.

**Highlights:** SFZ file playback, Audio Unit Extension (AUv3) support, Edit SFZ strings, Load SFZ files in place, Scala tuning file support, MIDI support

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Recorder Duet free?

Recorder Duet costs $0.99, with no in-app purchases.

### Is isfizz free?

isfizz costs $2.99, with no in-app purchases.

### Do Recorder Duet or isfizz have ads?

Neither Recorder Duet nor isfizz shows ads.

### Which is updated more often, Recorder Duet or isfizz?

Recorder Duet ships an update every 20 months, and isfizz every 3 weeks. Most recently, Recorder Duet was updated on November 6, 2026 and isfizz on November 7, 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.*