# No Problem vs Equation Encyclopedia

The clearest difference is in-app purchases: No Problem at none against Equation Encyclopedia's 9. No Problem also leads on ads (none vs shown). Equation Encyclopedia's advantage is iOS requirement (15.0 vs 18.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Equation Encyclopedia sells 9 in-app purchases, starting at $6.99 per month. No Problem asks for nothing beyond the download.

No Problem ships an update every 6 days, Equation Encyclopedia every 4 days. The most recent releases landed on October 2, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | No Problem | Equation Encyclopedia |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 days | **Every 4 days** |
| Size | 3 MB | 451 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yunqing Fei](https://appshunter.io/developer/1861075124) | [SAMUEL MOYOSORE O ADEYIGA](https://appshunter.io/developer/1874179107) |

## What reviewers say

### No Problem

[App page](https://appshunter.io/ios/app/no-problem-math-practice/id6756510231)

**Features:** macOS Compatibility

**In-app purchases:** none


### Equation Encyclopedia

[App page](https://appshunter.io/ios/app/equation-encyclopedia/id6758647681)

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Monthly | $6.99 | per month |
| Pro Monthly | $10.99 | per month |
| Ultra Monthly | $17.99 | per month |
| Plus Yearly | $49.99 | per year |
| Pro Yearly | $99.99 | per year |
| Ultra Yearly | $149.99 | per year |
| 10 Energy | $0.99 | one-time |
| 30 Energy | $2.99 | one-time |
| 100 Energy | $8.99 | one-time |


## Frequently asked questions

### Is No Problem free?

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

### Is Equation Encyclopedia free?

Equation Encyclopedia is free to download, with in-app purchases available.

### Do No Problem or Equation Encyclopedia have ads?

Equation Encyclopedia shows ads; No Problem does not.

### Which is updated more often, No Problem or Equation Encyclopedia?

No Problem ships an update every 6 days, and Equation Encyclopedia every 4 days. Most recently, No Problem was updated on October 2, 2026 and Equation Encyclopedia 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.*