# ScanOnce vs Deep Focus Noise Machine

The clearest difference is update cadence: Deep Focus Noise Machine at weekly against ScanOnce's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. ScanOnce sells 1 one-off in-app purchase and Deep Focus Noise Machine sells 4 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

ScanOnce ships an update every 2 months, Deep Focus Noise Machine weekly. The most recent releases landed on October 12, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | ScanOnce | Deep Focus Noise Machine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (26 ratings)](https://appshunter.io/ios/app/deep-focus-noise-machine-dpli/id6760627418/reviews)** |
| Number of ratings | — | **26** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 3 MB | 13 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Johanna Hoppe](https://appshunter.io/developer/1869099620) | [Lukasz Solniczek](https://appshunter.io/developer/1032070216) |

## What reviewers say

### ScanOnce

[App page](https://appshunter.io/ios/app/scanonce/id6759916701)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Access | $3.99 | one-time |


### 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 ScanOnce free?

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

### Is Deep Focus Noise Machine free?

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

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

Neither ScanOnce nor Deep Focus Noise Machine shows ads.

### Which is updated more often, ScanOnce or Deep Focus Noise Machine?

ScanOnce ships an update every 2 months, and Deep Focus Noise Machine weekly. Most recently, ScanOnce was updated on October 12, 2026 and Deep Focus Noise Machine on October 24, 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.*