# eCalc vs Nanotime

The clearest difference is in-app purchases: eCalc at none against Nanotime's 1. eCalc also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

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

Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on October 19, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | eCalc | Nanotime |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 days | Every 2 days |
| Monetization | — | Ad-supported |
| Size | 2 MB | 66 MB |
| Requires iOS | 17.6 | **16.4** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Quynh Dinh Huu](https://appshunter.io/developer/1140053429) | [Nemo factory](https://appshunter.io/developer/6781919423) |

## What reviewers say

### eCalc

[App page](https://appshunter.io/ios/app/ecalc-easy-calculator/id6787689502)

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

**In-app purchases:** none


### Nanotime

[App page](https://appshunter.io/ios/app/nanotime-server-time-clock/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 (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |


## Frequently asked questions

### Is eCalc free?

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

### Is Nanotime free?

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

### Do eCalc or Nanotime have ads?

Nanotime shows ads; eCalc does not.

### Which is updated more often, eCalc or Nanotime?

eCalc ships an update every 2 days, and Nanotime every 2 days. Most recently, eCalc was updated on October 19, 2026 and Nanotime on October 24, 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.*