# iFunctionGenerator vs KCSDI

The clearest difference is price: KCSDI at Free against iFunctionGenerator's $2.99. KCSDI also leads on update cadence (every 3 weeks vs every 12 months). iFunctionGenerator's advantage is iOS requirement (6.0 vs 15.5). On ads, in-app purchases and device support there is nothing between them.

KCSDI is free to download; iFunctionGenerator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iFunctionGenerator ships an update every 12 months, KCSDI every 3 weeks. The most recent releases landed on September 17, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | iFunctionGenerator | KCSDI |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.4 (9 ratings)](https://appshunter.io/ios/app/ifunctiongenerator/id304851755/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 53.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 3 weeks** |
| Monetization | Paid | — |
| Size | 1 MB | 31 MB |
| Requires iOS | **6.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Black Cat Systems](https://appshunter.io/developer/301047032) | [Chengdu KeChuang Institute of Science and Culture](https://appshunter.io/developer/1690764978) |

## What reviewers say

### iFunctionGenerator

[App page](https://appshunter.io/ios/app/ifunctiongenerator/id304851755)

This utility transforms your iOS device into a versatile audio function generator. Create up to 20 independent generators producing various waveforms and noise types, with precise control over frequency, volume, and phase for each channel. Save and recall your settings for quick access.

**Highlights:** Multiple waveform generation (sine, triangle, sawtooth, square), Pink and white noise generation, Up to 20 independent generators, Independent left/right channel volume control, Adjustable frequency from 1 to 20,000 Hz, Phase control, Save and load generator settings

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

**In-app purchases:** none


### KCSDI

[App page](https://appshunter.io/ios/app/kcsdi/id6667098118)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iFunctionGenerator free?

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

### Is KCSDI free?

KCSDI is free to download, with no in-app purchases.

### Do iFunctionGenerator or KCSDI have ads?

Neither iFunctionGenerator nor KCSDI shows ads.

### Which is updated more often, iFunctionGenerator or KCSDI?

iFunctionGenerator ships an update every 12 months, and KCSDI every 3 weeks. Most recently, iFunctionGenerator was updated on September 17, 2026 and KCSDI on September 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*