# Numerical Solver vs DeckRecall

The clearest difference is ads: Numerical Solver at none against DeckRecall's shown. DeckRecall's advantage is update cadence (every 3 days vs monthly) and iOS requirement (15.1 vs 17.6). On price, in-app purchases 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 and DeckRecall sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Numerical Solver ships an update monthly, DeckRecall every 3 days. The most recent releases landed on October 28, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Numerical Solver | DeckRecall |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 3 days** |
| Size | 3 MB | 44 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [i-SmartSolutions](https://appshunter.io/developer/391390898) | [Tony AI](https://appshunter.io/developer/1771887878) |

## 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 |


### DeckRecall

[App page](https://appshunter.io/ios/app/deckrecall-flashcards-and-srs/id6791685956)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DeckRecall Plus Monthly | $4.99 | per month |
| DeckRecall Plus Annual | $29.99 | per year |


## Frequently asked questions

### Is Numerical Solver free?

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

### Is DeckRecall free?

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

### Do Numerical Solver or DeckRecall have ads?

DeckRecall shows ads; Numerical Solver does not.

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

Numerical Solver ships an update monthly, and DeckRecall every 3 days. Most recently, Numerical Solver was updated on October 28, 2026 and DeckRecall on October 29, 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.*