# Combination & Decomposition vs DOST SIMATAR

The clearest difference is price: DOST SIMATAR at Free against Combination & Decomposition's $1.99. DOST SIMATAR also leads on update cadence (weekly vs every 33 months). Combination & Decomposition's advantage is iOS requirement (11.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

DOST SIMATAR is free to download; Combination & Decomposition costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Combination & Decomposition ships an update every 33 months, DOST SIMATAR weekly. The most recent releases landed on October 11, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Combination & Decomposition | DOST SIMATAR |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 33 months | **Weekly** |
| Size | 149 MB | 289 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [VIRTUAL FILAMENTS PRIVATE LIMITED](https://appshunter.io/developer/1474217212) | [Science Education Institute](https://appshunter.io/developer/1439710468) |

## What reviewers say

### Combination & Decomposition

[App page](https://appshunter.io/ios/app/combination-and-decomposition/id1544403959)

**Features:** macOS Compatibility

**In-app purchases:** none


### DOST SIMATAR

[App page](https://appshunter.io/ios/app/dost-simatar-matter/id6745665601)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Combination & Decomposition free?

Combination & Decomposition costs $1.99, with no in-app purchases.

### Is DOST SIMATAR free?

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

### Do Combination & Decomposition or DOST SIMATAR have ads?

Neither Combination & Decomposition nor DOST SIMATAR shows ads.

### Which is updated more often, Combination & Decomposition or DOST SIMATAR?

Combination & Decomposition ships an update every 33 months, and DOST SIMATAR weekly. Most recently, Combination & Decomposition was updated on October 11, 2026 and DOST SIMATAR on October 10, 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.*