# SustEarn vs Frequency Generator

The clearest difference is in-app purchases: SustEarn at none against Frequency Generator's 2. SustEarn also leads on iOS requirement (12.4 vs 18.3). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Frequency Generator sells 2 in-app purchases, starting at $4.99 per 7 days. SustEarn asks for nothing beyond the download.

SustEarn ships an update every 10 days, Frequency Generator every 3 weeks. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | SustEarn | Frequency Generator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (24 ratings)](https://appshunter.io/ios/app/frequency-generator-hz-tones/id6468866671/reviews)** |
| Number of ratings | — | **24** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 3 weeks |
| Monetization | — | Freemium |
| Size | 41 MB | 41 MB |
| Requires iOS | **12.4** | 18.3 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Harshit Kanodia](https://appshunter.io/developer/1456221091) | [Moonbush Games & Utilities App GmbH](https://appshunter.io/developer/1520736594) |

## What reviewers say

### SustEarn

[App page](https://appshunter.io/ios/app/sustearn/id1666982947)

**Features:** macOS Compatibility

**In-app purchases:** none


### Frequency Generator

[App page](https://appshunter.io/ios/app/frequency-generator-hz-tones/id6468866671)

Generate precise audio tones for sleep, focus, and relaxation. Explore a wide frequency range, shape waveforms, and access presets like Solfeggio frequencies. An optional Pro upgrade unlocks all features.

**Highlights:** Wide frequency range (1 Hz - 22,000 Hz), Multiple waveforms (sine, square, sawtooth, triangle), Background audio playback, Solfeggio frequencies and musical notes, Binaural beats and isochronic tones, Saved and pinned tone presets, Lock-screen and Control Center controls

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Weekly | $4.99 | per 7 days |
| Pro Yearly | $29.99 | per year |


## Frequently asked questions

### Is SustEarn free?

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

### Is Frequency Generator free?

Frequency Generator is free to download, with in-app purchases available.

### Do SustEarn or Frequency Generator have ads?

Neither SustEarn nor Frequency Generator shows ads.

### Which is updated more often, SustEarn or Frequency Generator?

SustEarn ships an update every 10 days, and Frequency Generator every 3 weeks. Most recently, SustEarn was updated on November 3, 2026 and Frequency Generator on November 8, 2026.

---

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