# Sum 12 vs RainMaker 4

The clearest difference is ads: RainMaker 4 at none against Sum 12's shown. RainMaker 4 also leads on update cadence (every 8 days vs every 3 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Sum 12 sells 1 one-off in-app purchase and RainMaker 4 sells 7 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Sum 12 ships an update every 3 months, RainMaker 4 every 8 days. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Sum 12 | RainMaker 4 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/rainmaker-4/id6751785587/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 8 days** |
| Monetization | — | Free with in-app purchases |
| Size | 46 MB | 7 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Vitalij Schaefer](https://appshunter.io/developer/393749449) | [Trevor Phillips](https://appshunter.io/developer/1836803938) |

## What reviewers say

### Sum 12

[App page](https://appshunter.io/ios/app/sum-12/id6738145230)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $5.99 | one-time |


### RainMaker 4

[App page](https://appshunter.io/ios/app/rainmaker-4/id6751785587)

Create personalized soundscapes with realistic rain and nature sounds for relaxation, focus, and meditation. Design your ideal weather experience anytime, anywhere.

**Highlights:** Realistic rain sounds, Nature soundscapes, Customizable sound mixing, Relaxation aid, Focus enhancement, Meditation tool

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LightningStrikes | $0.99 | one-time |
| rainforest | $0.99 | one-time |
| rainOnMetal | $0.99 | one-time |
| thunderstorm | $0.99 | one-time |
| rivers | $0.99 | one-time |
| waterfalls | $0.99 | one-time |
| continuousRainMode | $4.99 | one-time |


## Frequently asked questions

### Is Sum 12 free?

Sum 12 is free to download, with in-app purchases available.

### Is RainMaker 4 free?

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

### Do Sum 12 or RainMaker 4 have ads?

Sum 12 shows ads; RainMaker 4 does not.

### Which is updated more often, Sum 12 or RainMaker 4?

Sum 12 ships an update every 3 months, and RainMaker 4 every 8 days. Most recently, Sum 12 was updated on October 25, 2026 and RainMaker 4 on October 30, 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.*