# 나노타임 vs Atto

The clearest difference is review sentiment: Atto at 100% against 나노타임's 50%. 나노타임's advantage is in-app purchases (none vs 1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Atto sells 1 one-off in-app purchase. 나노타임 asks for nothing beyond the download.

나노타임 ships an update every 2 days, Atto every 3 days. The most recent releases landed on October 5, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | 나노타임 | Atto |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 2 days** | Every 3 days |
| Monetization | Ad-supported | — |
| Size | 62 MB | 11 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Nemo factory](https://appshunter.io/developer/6781919423) | [Beomjin In](https://appshunter.io/developer/1791890813) |

## What reviewers say

### 나노타임

[App page](https://appshunter.io/ios/app/pip/id6801582008)

This app displays the precise server time of ticketing and course registration websites in milliseconds. It directly queries the target site's server, accounting for network delays and server clock discrepancies. Get accurate countdowns and alerts for important events without relying on your phone's standard clock.

**Highlights:** Millisecond-accurate server time display, Direct server queries, no central server, Accounts for network delay and server clock drift, Supports over 1,200 pre-registered sites, Custom site input and favorites, Audio and vibration alerts for target times, Picture-in-Picture (PiP) mode for concurrent browsing

**In-app purchases:** none


### Atto

[App page](https://appshunter.io/ios/app/atto-ticket-drop-timer/id6811104130)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Atto Pro | $2.99 | one-time |


## Frequently asked questions

### Is 나노타임 free?

나노타임 is free to download, with no in-app purchases.

### Is Atto free?

Atto is free to download, with in-app purchases available.

### Do 나노타임 or Atto have ads?

Both 나노타임 and Atto show ads.

### Which is updated more often, 나노타임 or Atto?

나노타임 ships an update every 2 days, and Atto every 3 days. Most recently, 나노타임 was updated on October 5, 2026 and Atto on October 15, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*