# Numerical Solver vs Scollr

The clearest difference is in-app purchases: Scollr at none against Numerical Solver's 3. Scollr also leads on update cadence (fortnightly vs monthly) and iOS requirement (15.1 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. Numerical Solver sells 3 in-app purchases, starting at $2.99 per year. Scollr asks for nothing beyond the download.

Numerical Solver ships an update monthly, Scollr fortnightly. The most recent releases landed on September 18, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Numerical Solver | Scollr |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Size | 3 MB | 32 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [i-SmartSolutions](https://appshunter.io/developer/391390898) | [Chris Colpitts](https://appshunter.io/developer/1892198601) |

## What reviewers say

### Numerical Solver

[App page](https://appshunter.io/ios/app/numerical-solver/id6746115479)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Create Charts | $2.99 | per year |
| Calculate Integrals | $2.99 | per year |
| Solve system of algebraic eqns | $4.99 | per year |


### Scollr

[App page](https://appshunter.io/ios/app/scollr-research-papers/id6761957461)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Numerical Solver free?

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

### Is Scollr free?

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

### Do Numerical Solver or Scollr have ads?

Neither Numerical Solver nor Scollr shows ads.

### Which is updated more often, Numerical Solver or Scollr?

Numerical Solver ships an update monthly, and Scollr fortnightly. Most recently, Numerical Solver was updated on September 18, 2026 and Scollr on September 13, 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.*