# Atomic Clock PRO vs TweetyBot Mobile

The clearest difference is in-app purchases: TweetyBot Mobile at none against Atomic Clock PRO's 2. TweetyBot Mobile also leads on ads (none vs shown) and update cadence (fortnightly vs every 3 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Atomic Clock PRO sells 2 in-app purchases, starting at $1.99 per month. TweetyBot Mobile asks for nothing beyond the download.

Atomic Clock PRO ships an update every 3 months, TweetyBot Mobile fortnightly. The most recent releases landed on October 15, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Atomic Clock PRO | TweetyBot Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (10K ratings)](https://appshunter.io/ios/app/atomic-clock-pro/id899090224/reviews)** | — |
| Number of ratings | **10K** | — |
| Positive reviews | 73.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 20 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Brachmann Online Marketing GmbH & Co. KG](https://appshunter.io/developer/682848918) | [David Sprecher](https://appshunter.io/developer/1819331386) |

## What reviewers say

### Atomic Clock PRO

[App page](https://appshunter.io/ios/app/atomic-clock-pro/id899090224)

Get the most accurate time from an official atomic clock server. This app automatically detects your time zone and allows custom backgrounds. Easily switch between digital and analog clock displays with a swipe.

**Highlights:** Exact time from atomic clock, Automatic time zone recognition, Customizable background images, Digital and analog clock modes, Optional sound alerts, Color customization

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $1.99 | per month |
| Remove Ads | $5.99 | one-time |

**What reviewers like**

- ⭐ Accurate time display
- 📟 Useful for timing events
- 🕰️ Helpful for setting other clocks
- 🔍 Large, easy-to-read clock face

**What reviewers complain about**

- 💸 Subscription model for ad-free version
- 📢 Excessive advertisements
- 🔍 Small font for seconds display
- 🔀 Difficulty in displaying both analog and digital clocks simultaneously

**Reported bugs**

- Second hand occasionally runs in reverse
- Digital clock display cuts off on some devices
- Inconsistent behavior when switching between clock types

**Requested features**

- Customizable clock face options
- Ability to set widget on home screen
- Sync with system clock to automatically update time


### TweetyBot Mobile

[App page](https://appshunter.io/ios/app/tweetybot-mobile/id6746984068)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Atomic Clock PRO free?

Atomic Clock PRO is free to download, with in-app purchases available.

### Is TweetyBot Mobile free?

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

### Do Atomic Clock PRO or TweetyBot Mobile have ads?

Atomic Clock PRO shows ads; TweetyBot Mobile does not.

### Which is updated more often, Atomic Clock PRO or TweetyBot Mobile?

Atomic Clock PRO ships an update every 3 months, and TweetyBot Mobile fortnightly. Most recently, Atomic Clock PRO was updated on October 15, 2026 and TweetyBot Mobile on October 4, 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.*