# SolverPad vs NumLens by OpenSquare

The clearest difference is in-app purchases: NumLens by OpenSquare at none against SolverPad's 1. NumLens by OpenSquare also leads on ads (none vs shown) and update cadence (every 3 days vs weekly). SolverPad's advantage is iOS requirement (15.1 vs 17.0). On price and device support there is nothing between them.

Both are free to download. SolverPad sells 1 one-off in-app purchase. NumLens by OpenSquare asks for nothing beyond the download.

SolverPad ships an update weekly, NumLens by OpenSquare every 3 days. The most recent releases landed on September 20, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | SolverPad | NumLens by OpenSquare |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Weekly | **Every 3 days** |
| Size | 34 MB | 20 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [ASAPP STUDIO](https://appshunter.io/developer/1338092352) | [Ahmed Abdelkarim](https://appshunter.io/developer/1873299514) |

## What reviewers say

### SolverPad

[App page](https://appshunter.io/ios/app/solverpad-notepad-calculator/id6754253396)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Version | $0.99 | one-time |


### NumLens by OpenSquare

[App page](https://appshunter.io/ios/app/numlens-by-opensquare/id6760407566)

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

**In-app purchases:** none


## Frequently asked questions

### Is SolverPad free?

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

### Is NumLens by OpenSquare free?

NumLens by OpenSquare is free to download, with no in-app purchases.

### Do SolverPad or NumLens by OpenSquare have ads?

SolverPad shows ads; NumLens by OpenSquare does not.

### Which is updated more often, SolverPad or NumLens by OpenSquare?

SolverPad ships an update weekly, and NumLens by OpenSquare every 3 days. Most recently, SolverPad was updated on September 20, 2026 and NumLens by OpenSquare on September 17, 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.*