# RF 4DAT vs Whats Due Soon

The clearest difference is price: RF 4DAT at Free against Whats Due Soon's $0.99. Whats Due Soon's advantage is in-app purchases (none vs 1) and update cadence (monthly vs every 3 months). On ads, device support and iOS requirement there is nothing between them.

RF 4DAT is free to download; Whats Due Soon costs $0.99 up front. RF 4DAT sells 1 one-off in-app purchase. Whats Due Soon asks for nothing beyond the download.

RF 4DAT ships an update every 3 months, Whats Due Soon monthly. The most recent releases landed on October 10, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | RF 4DAT | Whats Due Soon |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Size | 1 MB | 2 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [4DAT LLC](https://appshunter.io/developer/1649051364) | [Myworkingmemory LLC](https://appshunter.io/developer/1892099684) |

## What reviewers say

### RF 4DAT

[App page](https://appshunter.io/ios/app/rf-4dat/id6757926768)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RF 4DAT Pro | $2.99 | one-time |


### Whats Due Soon

[App page](https://appshunter.io/ios/app/whats-due-soon-countdown/id6777145805)

**In-app purchases:** none


## Frequently asked questions

### Is RF 4DAT free?

RF 4DAT is free to download, with in-app purchases available.

### Is Whats Due Soon free?

Whats Due Soon costs $0.99, with no in-app purchases.

### Do RF 4DAT or Whats Due Soon have ads?

Neither RF 4DAT nor Whats Due Soon shows ads.

### Which is updated more often, RF 4DAT or Whats Due Soon?

RF 4DAT ships an update every 3 months, and Whats Due Soon monthly. Most recently, RF 4DAT was updated on October 10, 2026 and Whats Due Soon on October 25, 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.*