# PDFlow vs Deep Focus Noise Machine

The clearest difference is in-app purchases: PDFlow at none against Deep Focus Noise Machine's 4. Deep Focus Noise Machine's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Deep Focus Noise Machine sells 4 in-app purchases, starting at $0.99 per month. PDFlow asks for nothing beyond the download.

## The numbers

| Metric | PDFlow | Deep Focus Noise Machine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (25 ratings)](https://appshunter.io/ios/app/deep-focus-noise-machine-dpli/id6760627418/reviews)** |
| Number of ratings | — | **25** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | — | Weekly |
| Monetization | — | Free with in-app purchases |
| Size | 9 MB | 13 MB |
| Requires iOS | 17.6 | 17.6 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 17+ | 4+ |
| Developer | [David Villegas](https://appshunter.io/developer/1617174909) | [Lukasz Solniczek](https://appshunter.io/developer/1032070216) |

## What reviewers say

### PDFlow

[App page](https://appshunter.io/ios/app/pdflow/id6748611572)

**Features:** macOS Compatibility

**In-app purchases:** none


### Deep Focus Noise Machine

[App page](https://appshunter.io/ios/app/deep-focus-noise-machine-dpli/id6760627418)

This app generates unique, real-time audio soundscapes designed to prevent neural adaptation and enhance focus for neurodivergent individuals. It offers various noise colors and neurally-validated presets to create a spatial shield against distractions, all while operating 100% offline.

**Highlights:** Real-time generative audio, no loops, Spatial shielding with HRTF, Neurally-validated presets, Brown, pink, speech-shaped, and white noise, 100% offline functionality, Privacy-first, zero data tracking, Battery efficient native synthesis

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Dpli Monthly | $0.99 | per month |
| Dpli weekly | $0.99 | per 7 days |
| Dpli Yearly | $12.99 | per year |
| Dpli lifetime access | $12.99 | one-time |


## Frequently asked questions

### Is PDFlow free?

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

### Is Deep Focus Noise Machine free?

Deep Focus Noise Machine is free to download, with in-app purchases available.

### Do PDFlow or Deep Focus Noise Machine have ads?

PDFlow shows ads; Deep Focus Noise Machine does not.

---

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