Sum 12 vs RainMaker 4
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Sum 12
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Train your brain while having fun with numbers! This engaging domino game helps improve mental math skills as you strategically match pairs that add up to 12. It’s a great way for kids to practice quick addition in a playful and interactive way. Perfect for players of all ages who enjoy logic and number challenges! The goal of the game is to clear all the dominoes from the playing area. To do this, find two face-up dominoes whose values add up to 12 and select them one after the other. If their sum equals 12, they will be removed, allowing you to flip over any previously blocked dominoes. Keep in mind that a game is not always solvable, so you’ll need a mix of strategy and a bit of luck!
RainMaker 4
Create personalized soundscapes with realistic rain and nature sounds for relaxation, focus, and meditation. Design your ideal weather experience anytime, anywhere.
- Realistic rain sounds
- Nature soundscapes
- Customizable sound mixing
- Relaxation aid
- Focus enhancement
- Meditation tool
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“Relax, focus, and meditate with realistic rain and nature sounds. Build your perfect storm anywhere, anytime!”
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Sum 12 | RainMaker 4 |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Every 3 months | Every 8 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.0 | 18.0 |
| Further details — not scored | ||
| Size | 46 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Vitalij Schaefer | Trevor Phillips |
In-app purchases
Sum 12
- Remove ads$5.99
RainMaker 4
- LightningStrikes$0.99
- rainforest$0.99
- rainOnMetal$0.99
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- thunderstorm$0.99
- rivers$0.99
- waterfalls$0.99
- continuousRainMode$4.99
