# isfizz vs spectwhirl

The clearest difference is review sentiment: isfizz at 100% against spectwhirl's 33%. isfizz also leads on rating (4.7 vs 4.0) and chart position (#186 vs unranked). spectwhirl's advantage is iOS requirement (12.0 vs 15.0). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

isfizz costs $2.99 and spectwhirl $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

isfizz holds the better App Store score, 4.7 against 4.0. Both are backed by a comparable volume of ratings — 14 and 5 respectively. Written reviews point the same way: 100% of isfizz's written reviews are positive against 33% of spectwhirl's.

isfizz ships an update every 3 weeks, spectwhirl every 5 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | isfizz | spectwhirl |
| --- | --- | --- |
| Price | **$2.99** | $4.99 |
| Rating | **[4.7 (14 ratings)](https://appshunter.io/ios/app/isfizz/id6470708963/reviews)** | [4.0 (5 ratings)](https://appshunter.io/ios/app/spectwhirl/id6471030896/reviews) |
| Number of ratings | **14** | 5 |
| Positive reviews | **100.0% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Monetization | Paid | Paid |
| Best chart rank | **#186** | — |
| Size | 6 MB | 7 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ryouta Kira](https://appshunter.io/developer/862984358) | [Alexey Nadzharov](https://appshunter.io/developer/729549192) |

## What reviewers say

### isfizz

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

**Currently charting:** #186 Top Paid · Music (US App Store)

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


### spectwhirl

[App page](https://appshunter.io/ios/app/spectwhirl/id6471030896)

This audio effect app transforms input sound into new textures and bell-like tones by extracting and manipulating sinewave components. It offers advanced control over delay lines, frequency shifting, and filtering, with gesture recording for parameter automation.

**Highlights:** Sinewave component extraction and grouping, Delay lines with feedback, Frequency shifter and sample-and-hold effects, Configurable filtering, Gesture recording for automation, Scene saving and management

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

**In-app purchases:** none


## Frequently asked questions

### Is isfizz free?

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

### Is spectwhirl free?

spectwhirl costs $4.99, with no in-app purchases.

### Which has better reviews, isfizz or spectwhirl?

isfizz is rated higher. isfizz averages 4.7 out of 5 from 14 ratings, while spectwhirl averages 4.0 from 5 ratings.

### Do isfizz or spectwhirl have ads?

Neither isfizz nor spectwhirl shows ads.

### Which is updated more often, isfizz or spectwhirl?

isfizz ships an update every 3 weeks, and spectwhirl every 5 weeks. Most recently, isfizz was updated on October 25, 2026 and spectwhirl on October 24, 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.*