# Problem solver vs MARVLS

The clearest difference is ads: MARVLS at none against Problem solver's shown. Problem solver's advantage is device support (3 vs 1) and iOS requirement (8.0 vs 18.0). On price, update cadence and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Problem solver ships an update every 6 months, MARVLS every 4 months. The most recent releases landed on May 16, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Problem solver | MARVLS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 4 months** |
| Size | 10 MB | 242 MB |
| Requires iOS | **8.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 9+ |
| Developer | [Fabio Giuliani](https://appshunter.io/developer/1333671865) | [Michele McColgan](https://appshunter.io/developer/1532617986) |

## What reviewers say

### Problem solver

[App page](https://appshunter.io/ios/app/problem-solver-mechanics/id1435700320)

**Features:** macOS Compatibility

**In-app purchases:** none


### MARVLS

[App page](https://appshunter.io/ios/app/marvls-physics-i-mechanics/id6475370470)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Problem solver free?

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

### Is MARVLS free?

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

### Do Problem solver or MARVLS have ads?

Problem solver shows ads; MARVLS does not.

### Which is updated more often, Problem solver or MARVLS?

Problem solver ships an update every 6 months, and MARVLS every 4 months. Most recently, Problem solver was updated on May 16, 2026 and MARVLS on September 16, 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.*