# Sigma vs Pre Calculus Solver AI

The clearest difference is ads: Sigma at none against Pre Calculus Solver AI's shown. Pre Calculus Solver AI's advantage is iOS requirement (15.1 vs 26.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Sigma sells 2 in-app purchases, starting at $4.99 per 7 days and Pre Calculus Solver AI sells 5 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Sigma ships an update every 2 months, Pre Calculus Solver AI every 6 weeks. Both last shipped on October 17, 2026.

## The numbers

| Metric | Sigma | Pre Calculus Solver AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/pre-calculus-solver-ai/id6759664439/reviews)** |
| Number of ratings | — | **4** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 81 MB | 54 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yorgi Del Rio](https://appshunter.io/developer/1845433622) | [Serhii Shlykov](https://appshunter.io/developer/1809794912) |

## What reviewers say

### Sigma

[App page](https://appshunter.io/ios/app/sigma-statistics-calculator/id6759198563)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Annual | $29.99 | per year |


### Pre Calculus Solver AI

[App page](https://appshunter.io/ios/app/pre-calculus-solver-ai/id6759664439)

This app acts as a personal math tutor, helping users understand precalculus concepts. It provides step-by-step solutions to problems by analyzing photos or typed input, and offers interactive tutoring to deepen comprehension.

**Highlights:** Photo or text input for problems, Step-by-step solution explanations, Interactive AI tutoring, Convert solutions to flashcards, Covers various precalculus topics, Study at your own pace

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pre Calculus Solver AI Weekly | $4.99 | per 7 days |
| Pre Calculus Solver AI Weekly | $4.99 | per 7 days |
| Pre Calculus Solver AI Yearly | $19.99 | per year |
| Pre Calculus Solver AI Yearly | $29.99 | per year |
| Pre Calculus Solver AI Yearly | $29.99 | per year |


## Frequently asked questions

### Is Sigma free?

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

### Is Pre Calculus Solver AI free?

Pre Calculus Solver AI is free to download, with in-app purchases available.

### Do Sigma or Pre Calculus Solver AI have ads?

Pre Calculus Solver AI shows ads; Sigma does not.

### Which is updated more often, Sigma or Pre Calculus Solver AI?

Sigma ships an update every 2 months, and Pre Calculus Solver AI every 6 weeks. Most recently, Sigma was updated on October 17, 2026 and Pre Calculus Solver AI on October 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*