# RealPhase vs isfizz

The clearest difference is price: isfizz at $2.99 against RealPhase's $14.99. isfizz also leads on update cadence (fortnightly vs every 14 months). RealPhase's advantage is rating (5.0 vs 4.7) and iOS requirement (12.1 vs 15.0). On review sentiment, ratings volume, ads and in-app purchases there is nothing between them.

RealPhase costs $14.99 and isfizz $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RealPhase holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 5 and 14 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

RealPhase ships an update every 14 months, isfizz fortnightly. The most recent releases landed on September 15, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | RealPhase | isfizz |
| --- | --- | --- |
| Price | $14.99 | **$2.99** |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/realphase/id1588403482/reviews)** | [4.7 (14 ratings)](https://appshunter.io/ios/app/isfizz/id6470708963/reviews) |
| Number of ratings | 5 | **14** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Fortnightly** |
| Monetization | Paid | Paid |
| Size | 8 MB | 6 MB |
| Requires iOS | **12.1** | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [quantovox](https://appshunter.io/developer/484686124) | [Ryouta Kira](https://appshunter.io/developer/862984358) |

## What reviewers say

### RealPhase

[App page](https://appshunter.io/ios/app/realphase/id1588403482)

This app faithfully reproduces the sound of a legendary analog phaser pedal. It offers advanced modulation options, including barberpole effects and MIDI sync, for creating complex and rhythmic phasing sounds. Visualize real-time frequency response and enjoy exceptional multirate performance.

**Highlights:** Faithful reproduction of legendary phaser pedal, Composite LFOs and parallel phaser structures, Barberpole/Shepard phasing, Rhythmic pattern creation with LFO ratios, Mid-Side modes for stereo phasing, Real-time notch filter frequency visualization, MIDI note event reception for sync

**Features:** 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 RealPhase free?

RealPhase costs $14.99, with no in-app purchases.

### Is isfizz free?

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

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

RealPhase is rated higher. RealPhase averages 5.0 out of 5 from 5 ratings, while isfizz averages 4.7 from 14 ratings.

### Do RealPhase or isfizz have ads?

Neither RealPhase nor isfizz shows ads.

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

RealPhase ships an update every 14 months, and isfizz fortnightly. Most recently, RealPhase was updated on September 15, 2026 and isfizz on September 19, 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.*