# Sudogu vs RainMaker 4

The clearest difference is in-app purchases: Sudogu at none against RainMaker 4's 7. Sudogu also leads on iOS requirement (16.0 vs 18.0). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. RainMaker 4 sells 7 one-off in-app purchases. Sudogu asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Sudogu against 5.0 for RainMaker 4. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Sudogu ships an update fortnightly, RainMaker 4 every 8 days. The most recent releases landed on October 9, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Sudogu | RainMaker 4 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/sudogu/id6739965254/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/rainmaker-4/id6751785587/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 8 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 18 MB | 7 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Neil Rohan](https://appshunter.io/developer/1522614743) | [Trevor Phillips](https://appshunter.io/developer/1836803938) |

## What reviewers say

### Sudogu

[App page](https://appshunter.io/ios/app/sudogu/id6739965254)

This app offers a unique take on Sudoku with user-loaded solution algorithms and instant feedback on incorrect guesses. Enjoy multiple difficulty levels, no time limits, and save your progress anytime. It provides a relaxed, ad-free gaming experience for all ages.

**Highlights:** User loaded solution algorithms, Immediate feedback on wrong guesses, Four difficulty levels, No time limits, Save progress anytime, Detailed game records, Ad-free experience

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

**In-app purchases:** none


### 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 Sudogu free?

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

### Is RainMaker 4 free?

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

### Which has better reviews, Sudogu or RainMaker 4?

Sudogu and RainMaker 4 are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.

### Do Sudogu or RainMaker 4 have ads?

Neither Sudogu nor RainMaker 4 shows ads.

### Which is updated more often, Sudogu or RainMaker 4?

Sudogu ships an update fortnightly, and RainMaker 4 every 8 days. Most recently, Sudogu was updated on October 9, 2026 and RainMaker 4 on September 29, 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.*