# Signal Generator vs Prometheus

The clearest difference is price: Prometheus at Free against Signal Generator's $0.99. Prometheus also leads on rating (5.0 vs 4.6) and update cadence (every 3 months vs every 15 months). Signal Generator's advantage is ratings volume (10 vs 1) and iOS requirement (11.0 vs 17.6). On ads, in-app purchases and device support there is nothing between them.

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

Prometheus holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Signal Generator has 10 ratings behind it against 1, so its average is the more settled of the two.

Signal Generator ships an update every 15 months, Prometheus every 3 months. The most recent releases landed on October 29, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Signal Generator | Prometheus |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [4.6 (10 ratings)](https://appshunter.io/ios/app/signal-generator-wave/id1309709776/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/prometheus-age-clock-and-timer/id6757980278/reviews)** |
| Number of ratings | **10** | 1 |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 3 months** |
| Monetization | Paid | **Free** |
| Size | 2 MB | 5 MB |
| Requires iOS | **11.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 12+ | 4+ |
| Developer | [龙刚 李](https://appshunter.io/developer/1241843884) | [Wouter Stierhout](https://appshunter.io/developer/1454164937) |

## 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


### Prometheus

[App page](https://appshunter.io/ios/app/prometheus-age-clock-and-timer/id6757980278)

Visualize your life as a continuously updating clock, down to 10 decimal places. Track unique milestones and explore life statistics. Available on iPhone and Apple Watch with customizable widgets and complications.

**Highlights:** Decimal age clock, Life milestone countdowns, Detailed life statistics, Apple Watch app and complications, Home and Lock Screen widgets, Live Activities support

**Features:** macOS Compatibility, Apple Watch app, 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 Prometheus free?

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

### Which has better reviews, Signal Generator or Prometheus?

Prometheus is rated higher. Signal Generator averages 4.6 out of 5 from 10 ratings, while Prometheus averages 5.0 from 1 ratings.

### Do Signal Generator or Prometheus have ads?

Neither Signal Generator nor Prometheus shows ads.

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

Signal Generator ships an update every 15 months, and Prometheus every 3 months. Most recently, Signal Generator was updated on October 29, 2026 and Prometheus on October 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.*