Comparison

ScanOnce vs Deep Focus Noise Machine

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ScanOnce

Features
Read full description

ScanOnce helps you capture, organize, and understand documents quickly. • Fast document scanning with automatic page capture • On-device OCR text extraction • Smart document insights (sender, totals, dates, invoice details) • Ask questions about your scanned document • Export and share as PDF • Privacy-first workflow with local processing Upgrade once for Lifetime Access to unlimited scanning.

About

Deep Focus Noise Machine

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
Read full description

dpli creates real-time, evolving spatial soundscapes for ADHD focus and deep work — generated live on your device, never played from a loop. Unlike standard noise apps that replay prerecorded tracks, dpli synthesizes every layer in real time. Sound sources can move through space, shift in intensity, and modulate independently, creating an immersive background that stays dynamic throughout your session. BUILT FOR FOCUS Choose a preset based on what you need: • SHIELD — A steady spatial soundscape designed to mask conversations, office noise, and sudden distractions. • FLOW — Moving, asymmetric layers that create an engaging background for writing, coding, studying, and deep work. • CLARITY — Steady, precisely layered noise that masks distractions and creates a clear background for writing, coding, studying, and deep work. • IGNITION — Designed for ADHD brains or anyone needing a strong push into active focus. An energizing white-noise field with dual-rhythm pulses and airy blue-noise sparkle that drives alertness and mental speed. • RELAX — A heavy brown-noise blanket with two pink streams drifting slowly around your head — eases you into deep physical relaxation while staying awake. Good for winding down, tension release, or a mid-day relax. • RESET — A still, dark cocoon with a slow warm breath that gently sways around you — shifts the mind from stress into rest. Best for 10–20 minute breaks when you feel wound up or anxious. SESSIONS — YOUR RHYTHM OF WORK AND REST Build your own sound sequence on iPhone or Mac. Choose a sound and duration for each stage — FLOW for focused work, then RELAX for a break, for example. dpli blends smoothly between stages and gently fades out at the end. Start with one stage using a free sound. Premium unlocks additional stages and the full preset collection. MORE THAN COLORED NOISE Brown, pink and white noise generators are included for free. They are also the building blocks behind dpli’s layered presets, where position, movement, modulation, and frequency balance work together to create a richer listening environment. GENERATED, NOT STREAMED • No prerecorded audio files • No repeating MP3 loops • Real-time synthesis on your device • Spatial movement and independent modulation • Works offline with no account required PRIVATE BY DESIGN Your sessions stay on your device. dpli does not stream audio, require an account, or collect listening data. MADE FOR THE APPLE ECOSYSTEM Use dpli on iPhone, Mac, and Apple Watch. Start a session wherever you work, study, travel, or need a more controlled acoustic environment. dpli is a focus and sound-masking tool. It is not intended to diagnose, treat, or cure ADHD or any other medical condition. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

ScanOnce4 screens
Deep Focus Noise Machine4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard1 real difference · 9 level
ScanOnce versus Deep Focus Noise Machine: the parameters behind the verdict, then further details
ParameterScanOnceDeep Focus Noise Machine
PriceFreeFree
Rating—4.7 (26 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—26 — better
Update frequencyEvery 2 monthsWeekly — better
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPadiPhone, iPad, Mac — better
Requires iOS17.0 — better17.6
Further details — not scored
Size3 MB13 MB
Age rating4+4+
DeveloperJohanna HoppeLukasz Solniczek

In-app purchases

1 purchases

ScanOnce

One-time1
  • Lifetime Access$3.99
4 purchases

Deep Focus Noise Machine

Subscriptions3
  • Dpli Monthly$0.991 Month
  • Dpli weekly$0.997 Days
  • Dpli Yearly3 Days trial$12.991 Year
One-time1
  • Dpli lifetime access$12.99

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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