# Signal Generator vs SIENG

The clearest difference is price: SIENG at Free against Signal Generator's $0.99. SIENG also leads on update cadence (every 5 weeks vs every 15 months). Signal Generator's advantage is iOS requirement (11.0 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

SIENG is free to download; Signal Generator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Signal Generator ships an update every 15 months, SIENG every 5 weeks. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Signal Generator | SIENG |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.6 (10 ratings)](https://appshunter.io/ios/app/signal-generator-wave/id1309709776/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 5 weeks** |
| Monetization | Paid | — |
| Size | 2 MB | 28 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [龙刚 李](https://appshunter.io/developer/1241843884) | [Sengxay Xayachack](https://appshunter.io/developer/6772868315) |

## What reviewers say

### Signal Generator

[App page](https://appshunter.io/ios/app/signal-generator-wave/id1309709776)

Generate high-quality audio signals including sine, square, triangle, sawtooth waves, and white/pink noise. Ideal for testing audio systems, frequency response, and hearing capabilities.

**Highlights:** Sine wave generation, Square wave generation, White noise generation, Pink noise generation, Two-channel phase difference waves, Audio frequency response testing, Hearing test capabilities

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

**In-app purchases:** none


### SIENG

[App page](https://appshunter.io/ios/app/sieng/id6772868313)

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

**In-app purchases:** none


## Frequently asked questions

### Is Signal Generator free?

Signal Generator costs $0.99, with no in-app purchases.

### Is SIENG free?

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

### Do Signal Generator or SIENG have ads?

Neither Signal Generator nor SIENG shows ads.

### Which is updated more often, Signal Generator or SIENG?

Signal Generator ships an update every 15 months, and SIENG every 5 weeks. Most recently, Signal Generator was updated on November 2, 2026 and SIENG on November 5, 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.*