# Dr Evil's Math Challenge Game vs Einstein Riddle Megamix

The clearest difference is ads: Dr Evil's Math Challenge Game at none against Einstein Riddle Megamix's shown. Einstein Riddle Megamix's advantage is update cadence (every 4 days vs every 91 months) and iOS requirement (15.3 vs 18.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Dr Evil's Math Challenge Game sells 3 one-off in-app purchases and Einstein Riddle Megamix sells 6 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Dr Evil's Math Challenge Game ships an update every 91 months, Einstein Riddle Megamix every 4 days. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Dr Evil's Math Challenge Game | Einstein Riddle Megamix |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/dr-evils-math-challenge-game/id430014867/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 91 months | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 322 MB | 20 MB |
| Requires iOS | 18.0 | **15.3** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Socially Conscious Software LLC](https://appshunter.io/developer/302019503) | [LIBOR MASICEK](https://appshunter.io/developer/1783292926) |

## What reviewers say

### Dr Evil's Math Challenge Game

[App page](https://appshunter.io/ios/app/dr-evils-math-challenge-game/id430014867)

A unique number puzzle game blending Sudoku mechanics with arithmetic challenges. Solve puzzles by making cells in 3x3 houses add up to 10, with added column sum targets in advanced modes. Enjoy a 1970s disco game show theme with a funky soundtrack and a mad-scientist host.

**Highlights:** Arithmetic number puzzles, Sudoku-like house sums, Column sum targets (Gauntlet mode), Daily challenges, Multiple difficulty levels, Disco funk soundtrack, Interactive tutorial

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Medium | $0.99 | one-time |
| Unlock Hard | $0.99 | one-time |
| Unlock Pro | $0.99 | one-time |


### Einstein Riddle Megamix

[App page](https://appshunter.io/ios/app/einstein-riddle-megamix/id6753361421)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Supporter \| Weekly | $0.99 | per 7 days |
| Supporter \| Monthly | $1.99 | per month |
| Supporter \| Yearly | $14.99 | per year |
| +10 hints | $0.99 | one-time |
| +25 hints | $1.99 | one-time |
| +100 hints | $4.99 | one-time |


## Frequently asked questions

### Is Dr Evil's Math Challenge Game free?

Dr Evil's Math Challenge Game is free to download, with in-app purchases available.

### Is Einstein Riddle Megamix free?

Einstein Riddle Megamix is free to download, with in-app purchases available.

### Do Dr Evil's Math Challenge Game or Einstein Riddle Megamix have ads?

Einstein Riddle Megamix shows ads; Dr Evil's Math Challenge Game does not.

### Which is updated more often, Dr Evil's Math Challenge Game or Einstein Riddle Megamix?

Dr Evil's Math Challenge Game ships an update every 91 months, and Einstein Riddle Megamix every 4 days. Most recently, Dr Evil's Math Challenge Game was updated on November 6, 2026 and Einstein Riddle Megamix 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.*