ZoneSync vs Atto
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ZoneSync
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Features: • Track up to 4 cities simultaneously • Beautiful, easy-to-read widget for your home screen • Support for both English and Persian languages • Automatic daylight saving time adjustments • Works offline - no internet required • Clean, modern interface Never miss a meeting or call with international contacts again. ZoneSync helps you plan your day around global time differences with ease. زون سینک مدیریت مناطق زمانی را بسیار ساده میکند. با رابط کاربری تمیز و شیک، میتوانید زمان چندین شهر در سراسر جهان را تنها با چند ضربه پیگیری کنید. ویژگیها: • نمایش ساعت جهانی با طراحی زیبا • جستجو و افزودن سریع شهرها • تغییر زبان آسان بین انگلیسی و فارسی • ویجت صفحه خانگی برای مشاهده سریع اطلاعات زمانی • بهروزرسانی خودکار مناطق زمانی دیگر هرگز قرار ملاقات یا تماس با مخاطبان بینالمللی خود را از دست ندهید. زون سینک به شما کمک میکند تا روز خود را به راحتی بر اساس اختلاف زمانی جهانی برنامهریزی کنید.
Atto
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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
Verdict
The clearest difference is in-app purchases: ZoneSync at none against Atto's 1. ZoneSync also leads on ads (none vs shown). On price, 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
Both are free to download. Atto sells 1 one-off in-app purchase. ZoneSync asks for nothing beyond the download.
| Parameter | ZoneSync | Atto |
|---|---|---|
| Price | Free | Free |
| Update frequency | — | Every 3 days |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 1 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Vahid HAGHIGHAT | Beomjin In |
In-app purchases
ZoneSync
No in-app purchases
Atto
- Atto Pro$2.99









