Comparison

Sumi vs Smart Noise Detector

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

Head to head
About

Sumi

This app helps you reduce phone usage by setting timers for breaks. It alerts you if you touch or move your device during the break, aiming to boost productivity and mental well-being.

Highlights
  • Timed phone breaks
  • Movement alerts
  • Productivity enhancement
  • Mental health improvement
  • Simple interface
Features
Read full description

The most beautiful thing an app can do is get out of your way. Sumi sits quietly on cream paper, holds your attention for an hour, and asks for nothing back. Set a length. Put your phone face down. Pick it up before the time is done and the session breaks — not as a punishment, but as a commitment kept. No ads. No notifications. No streaks-as-slot-machines. No weekly subscription trap. Just deep work, and the quiet record of the hours you've given it. — THE RITUAL — Set an intention and a length. Put the phone down. Sumi keeps watch: lift it, or leave the app, and the session ends. When the time is held, the line completes, your lifetime hours grow, and the session is logged. Silent while you work. Quietly rewarding when you finish. — A CALM LEDGER, NOT A GAME — The number that only goes up: your lifetime hours focused. A streak, if you want one. A week that fills, a line that climbs. No characters to feed, no points, no dark patterns. Progress you can feel, with nothing engineered to hook you. — MADE FOR DEEP-WORK PEOPLE — For writers, developers, designers, students of a craft — anyone who already romanticizes focus and resents apps built to fracture it. Graphite and cream. Monospace. Paper grain. A single calligraphic mark. — PAY ONCE — Your focus shouldn't be a recurring charge. Sumi is free to use, with an optional one-time Lifetime unlock (or a subscription, if you prefer) for custom lengths, full history and trends, themes, and session intentions. Put the phone down. Pick the work up. ——— Privacy Policy: https://dayonefoundry.com/sumi/privacy Terms of Use (EULA): https://dayonefoundry.com/sumi/terms

About

Smart Noise Detector

Features
Read full description

Smart Noise Detector helps you capture sounds that stand out from the background. Start monitoring, let the app measure the room for three seconds, and it will record automatically when the sound crosses your chosen threshold. AUTOMATIC RECORDING • Monitor relative sound levels in real time. • Choose a threshold of +12, +18, or +24 dB above the ambient baseline. • Save each sound event as a separate M4A file. • Stop each recording after two seconds below the threshold. • Recalibrate when your surroundings change. • Continue monitoring with background audio support. FIND AND SHARE YOUR RECORDINGS Review recordings by date, time, and duration. Play a recording or tap Share to send the audio file through the iOS share sheet, use AirDrop, or save a copy to Files. Tap Select to choose several recordings or select all, then review the count before deleting. Canceling keeps your selection, and any recordings that cannot be deleted stay in the list so you can try again. ENGLISH AND KOREAN The app supports English and Korean, with English as the default for other device languages. YOUR RECORDINGS STAY WITH YOU Recordings are stored on your device and remain available when you update the app. NoiseDetector does not collect your recordings or upload them to a server. Audio leaves the app only when you choose to share it. Sound levels are relative to your device microphone and are not calibrated sound pressure measurements. Use the app to review everyday sounds, noise events, or barking while monitoring is active.

Screenshots

Sumi4 screens
Smart Noise Detector4 screens

Verdict

The call

The clearest difference is price: Sumi at Free against Smart Noise Detector's $0.99. Sumi also leads on update cadence (every 5 days vs every 3 months). Smart Noise Detector's advantage is in-app purchases (none vs 3). On ads, device support and iOS requirement 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

Sumi is free to download; Smart Noise Detector costs $0.99 up front. Sumi sells 3 in-app purchases, starting at $5.99 per month. Smart Noise Detector asks for nothing beyond the download.

UpkeepUpdate frequency

Sumi ships an update every 5 days, Smart Noise Detector every 3 months. The most recent releases landed on October 7, 2026 and October 28, 2026 respectively.

Scorecard3 real differences · 7 level
Sumi versus Smart Noise Detector: the parameters behind the verdict, then further details
ParameterSumiSmart Noise Detector
PriceFree — better$0.99
Rating3.0 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 5 days — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhoneiPhone, iPad — better
Requires iOS16.0 — better17.0
Further details — not scored
Size10 MB1 MB
Age rating4+4+
DeveloperDavid ParkYongShin Kwak

In-app purchases

3 purchases

Sumi

Subscriptions2
  • Sumi Pro Monthly$5.991 Month
  • Sumi Pro Annual7 Days trial$24.991 Year
One-time1
  • Sumi Pro Lifetime$49.99
None

Smart Noise Detector

No in-app purchases

Questions

Is Sumi free?
Sumi is free to download, with in-app purchases available.
Is Smart Noise Detector free?
Smart Noise Detector costs $0.99, with no in-app purchases.
Do Sumi or Smart Noise Detector have ads?
Neither Sumi nor Smart Noise Detector shows ads.
Which is updated more often, Sumi or Smart Noise Detector?
Sumi ships an update every 5 days, and Smart Noise Detector every 3 months. Most recently, Sumi was updated on October 7, 2026 and Smart Noise Detector on October 28, 2026.

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