Comparison

ゆらぎ時計 1/f vs Atto

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

Head to head
About

ゆらぎ時計 1/f

Features
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くろねこ研究所 KuronekoLab. 1/fのリズムでゆらぐのほのかな灯のレトロな時計 光って、ゆらぐだけのライトに時計がついた 画面をタッチして動かすと色を変えられます 斜めに動かしてね 足跡機能をONにすると時々足跡が歩き出す Fluctuation light 1 / f a faint light with fluctuations Feel free to use it to illuminate your surroundings with the brightness of the screen. Usage is free Just shine and shake You can change the color by touching and moving the screen Move it diagonally

About

Atto

This utility app precisely measures and displays server clock times for time-sensitive events like ticket drops. It offers advanced features to correct for device drift and ensure accurate countdowns, even while using other applications.

Highlights
  • Server clock synchronization
  • Millisecond precision countdown
  • Device drift correction
  • Picture-in-Picture mode
  • Haptic and sound alerts
  • Practice mode for timing
  • Supports over 300 time sources
Features
Read full description

A ticket drop is decided in milliseconds, not seconds. The queue opens on the booking server's clock, not your phone's. The two are usually tens to hundreds of milliseconds apart, and that gap decides your place in line. Atto reads the server's clock directly, and shows you how well it read it. Measuring server time An HTTP Date header only resolves to the second, so one read tells you ±500ms and no more. Atto probes at 137ms intervals so each request lands on a different phase inside the second. Once the offset narrows, it predicts when the server's second will roll over and aims at that edge. Twenty overlapping measurements fold the error down to the round trip. The error bar stays visible Instead of a label like "high accuracy" you get the measured figure: ±23ms. Sample count, rejected samples, best round trip, and how far this server runs from national standard time are all on screen. Cached responses get dropped When a CDN answers instead of the origin, the clock inside that response is frozen at the moment it was stored. Atto checks the Age and cache headers and keeps those responses out of the average. Device drift correction Your phone's oscillator runs seconds off per day. Atto measures the slope between syncs, extrapolates it to now, and re-syncs every two minutes while you wait. Picture in Picture Press Start and a Picture in Picture window floats above your other apps. Show a decreasing countdown or a corrected wall clock that advances toward your configured target, with three-digit milliseconds. Keep the timing in sight while using a booking app or webpage. Haptics and sound Taps begin at the lead time you set and end with one hard hit at zero. The whole pattern goes to Core Haptics up front rather than a timer, so zero does not move even if the screen stutters. Sound is optional and plays through the silent switch. Practice mode A recommended lead time is somebody else's number. Measure the gap between the buzz and your tap actually registering, then apply your own median. Time sources Over 300 sources across 14 regions, including Ticketmaster, AXS, StubHub, Interpark, e+, tixCraft and Damai, plus course registration sites and sneaker drops. Standard-time servers like NIST, NPL, PTB, NICT and KRISS are there too, and you can type any address yourself. Free and paid Everything that decides whether you get the ticket is free: full sync accuracy, drift correction, the on-screen countdown, haptics, every time source, practice mode. One rewarded ad floats a single countdown in a PiP window. A one-time purchase removes ads and keeps PiP unlocked. It is not a subscription. Reading a clock takes one HEAD request. Atto never asks for an account and takes no part in the booking itself. English, 한국어, 日本語

Screenshots

ゆらぎ時計 1/f1 screens
Atto4 screens

Verdict

The call

The clearest difference is in-app purchases: ゆらぎ時計 1/f at none against Atto's 1. ゆらぎ時計 1/f also leads on device support (3 vs 1) and iOS requirement (12.0 vs 17.0). Atto's advantage is update cadence (every 3 days vs every 2 months). On price and ads 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. Atto sells 1 one-off in-app purchase. ゆらぎ時計 1/f asks for nothing beyond the download.

UpkeepUpdate frequency

ゆらぎ時計 1/f ships an update every 2 months, Atto every 3 days. The most recent releases landed on October 11, 2026 and October 15, 2026 respectively.

Scorecard4 real differences · 4 level
ゆらぎ時計 1/f versus Atto: the parameters behind the verdict, then further details
Parameterゆらぎ時計 1/fAtto
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequencyEvery 2 monthsEvery 3 days — better
AdsYesYes
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.0 — better17.0
Further details — not scored
Size15 MB11 MB
Age rating4+4+
Developertakayuki atsumiBeomjin In

In-app purchases

None

ゆらぎ時計 1/f

No in-app purchases

1 purchases

Atto

One-time1
  • Atto Pro$2.99

Questions

Is ゆらぎ時計 1/f free?
ゆらぎ時計 1/f is free to download, with no in-app purchases.
Is Atto free?
Atto is free to download, with in-app purchases available.
Do ゆらぎ時計 1/f or Atto have ads?
Both ゆらぎ時計 1/f and Atto show ads.
Which is updated more often, ゆらぎ時計 1/f or Atto?
ゆらぎ時計 1/f ships an update every 2 months, and Atto every 3 days. Most recently, ゆらぎ時計 1/f was updated on October 11, 2026 and Atto on October 15, 2026.

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