# 4 vs rEvoCalc

The clearest difference is price: rEvoCalc at Free against 4's $3.99. rEvoCalc also leads on in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

rEvoCalc is free to download; 4 costs $3.99 up front. 4 sells 1 one-off in-app purchase. rEvoCalc asks for nothing beyond the download.

## The numbers

| Metric | 4 | rEvoCalc |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[3.3 (3 ratings)](https://appshunter.io/ios/app/4-way-coach/id477045460/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 84.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 10 months | — |
| Monetization | Paid | — |
| Size | 12 MB | 8 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [AirXygene Parachutisme](https://appshunter.io/developer/405851556) | [CAP-REL](https://appshunter.io/developer/1405536766) |

## What reviewers say

### 4

[App page](https://appshunter.io/ios/app/4-way-coach/id477045460)

Visualize and plan skydiving jumps with animated guides for 3-way and 4-way relative work. Prepare briefings, practice moves, and judge jumps for training or competition.

**Highlights:** Animated 4-way relative work guides, 3-way relative work visualization, Jump briefing preparation, Practice jump moves, Jump judging assistance, Pocket-sized competition tool

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3-Way Formations | $1.99 | one-time |


### rEvoCalc

[App page](https://appshunter.io/ios/app/revocalc/id1574773013)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 4 free?

4 costs $3.99, and also offers in-app purchases.

### Is rEvoCalc free?

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

### Do 4 or rEvoCalc have ads?

Neither 4 nor rEvoCalc 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.*