Signal Generator vs Prometheus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Signal Generator
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.
- Sine wave generation
- Square wave generation
- White noise generation
- Pink noise generation
- Two-channel phase difference waves
- Audio frequency response testing
- Hearing test capabilities
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A high-quality audio Signal Generator for the iPhone. Now you can have a professional grade signal generator for your iPhone. Create sine waves, square waves, white noise, and pink noise. The signal generator can help you generate sine, square, triangle, sawtooth, white noise, pink noise signals and generate sine two-channel phase difference waves. You can use the signal generator to test your audio frequency response system, system noise scanning, headset burning machine and other scenarios. Test your hearing can hear how low the frequency of sound. Able to apply and experiment with test scenarios.
Prometheus
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.
- Decimal age clock
- Life milestone countdowns
- Detailed life statistics
- Apple Watch app and complications
- Home and Lock Screen widgets
- Live Activities support
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Your time is precious. See it. Prometheus turns your age into a living clock, updating continuously to 10 decimal places. Count down to numbers you will only pass once, explore your life in weeks and statistics, and keep time visible across iPhone and Apple Watch. YOUR LIFE, LIVE • See your decimal age or a detailed breakdown of years, months, days, hours, minutes, and seconds • Count down to your billionth second, 10,000th day, next trip around the sun, and other once-in-a-lifetime milestones • Get an optional alert at the exact moment a milestone arrives • Explore estimated heartbeats and breaths, lunar cycles, distance traveled through space, and more • See your entire life as one dot for every week ON EVERY SCREEN • Apple Watch app and watch face complications • Home Screen and Lock Screen widgets • Live Activities on the Lock Screen and Dynamic Island • Shareable cards for Stories, Reels, and more SET UP ONCE Enter your birth date and time. Prometheus handles the rest. Your birth data stays on your devices, and no account or sign-in is required. Named after the Titan who gave humanity fire and knowledge, Prometheus is a reminder to see and use your most precious resource: time.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Signal Generator | Prometheus |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.6 (10 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 85.7% of reviews | — |
| Number of ratings | 10 — better | 1 |
| Update frequency | Every 15 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Requires iOS | 11.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 2 MB | 5 MB |
| Age rating | 12+ | 4+ |
| Developer | 龙刚 李 | Wouter Stierhout |
Customer experience
Signal Generator
Prometheus
In-app purchases
Signal Generator
No in-app purchases
Prometheus
No in-app purchases
Questions
Is Signal Generator free?
Is Prometheus free?
Which has better reviews, Signal Generator or Prometheus?
Do Signal Generator or Prometheus have ads?
Which is updated more often, Signal Generator or Prometheus?
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