# DownClock — Transfer time calculator

> Transfer time calculator (iPhone/iPad app by Artem Trubitsyn.)

- Source: https://appshunter.io/ios/app/downclock/id6767010100 (this page in markdown: same URL + `.md`)
- Developer: [Artem Trubitsyn](https://appshunter.io/developer/1896346312)
- Category: Utilities
- Price: $1.99
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: American English
- Released: 2026-05-15
- Data updated: 2026-06-30
- User reviews in markdown: https://appshunter.io/ios/app/downclock/id6767010100/reviews.md

## What is DownClock?

Ever wondered exactly how long a 4K video will take to upload, or whether your new ISP plan is actually faster? DownClock gives you an instant, accurate answer.

Enter a file size (KB to TB, binary or SI), pick your connection speed from common presets or type your own, and watch the result roll in — days, hours, minutes, seconds.

Built for developers, IT admins, content creators, and anyone comparing ISP plans. No ads. No accounts. No nonsense.

FEATURES
- File sizes from KB to TB — binary (KiB/GiB) and SI units
- Speed presets: 1 Mbps to 10 Gbps
- Compare two ISP providers side by side
- Calculation history
- Protocol overhead slider (TCP/IP + HTTP)
- ISP efficiency slider (advertised vs. actual speed)
- Animated rolling-digit result display
- Light, dark, or system appearance
- iPhone and iPad — portrait optimized
- Zero network requests. Completely private.


## Version history (last 2 releases)

### 1.1 — 2026-05-26

Speed Test — measure your real download speed directly in the app, then instantly use it in your calculations.

### 1.0 — 2026-05-11

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-30.*