# Atomic Clock vs SIE Tutor

The clearest difference is in-app purchases: Atomic Clock at none against SIE Tutor's 1. Atomic Clock also leads on iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. SIE Tutor sells 1 one-off in-app purchase. Atomic Clock asks for nothing beyond the download.

## The numbers

| Metric | Atomic Clock | SIE Tutor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/atomic-clock-exact-time/id6752546454/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 days |
| Monetization | Free | — |
| Size | 29 MB | 14 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [STAN I. C. ALEXANDRU PERSOANA FIZICA AUTORIZATA](https://appshunter.io/developer/1799569348) | [浩东 许](https://appshunter.io/developer/1834069800) |

## What reviewers say

### Atomic Clock

[App page](https://appshunter.io/ios/app/atomic-clock-exact-time/id6752546454)

This app provides ultra-accurate time by synchronizing with global atomic clock servers. It offers a precise time display suitable for professionals, travelers, and anyone needing absolute accuracy. Features include real-time sync, customizable display options, and a minimalist interface.

**Highlights:** Real-time synchronization with atomic clock servers, 24-hour and 12-hour display, Minimalist clock face with dark mode, Offline functionality with last known time, Precise time down to the millisecond

**Features:** macOS Compatibility

**In-app purchases:** none


### SIE Tutor

[App page](https://appshunter.io/ios/app/sie-tutor-ai-exam-prep/id6772922214)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SIE Tutor Pro | $4.99 | one-time |


## Frequently asked questions

### Is Atomic Clock free?

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

### Is SIE Tutor free?

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

### Do Atomic Clock or SIE Tutor have ads?

Neither Atomic Clock nor SIE Tutor shows ads.

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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.*