# Calc vs Ptilop.sys

The clearest difference is in-app purchases: Ptilop.sys at none against Calc's 3. Ptilop.sys also leads on ads (none vs shown). Calc's advantage is iOS requirement (12.0 vs 16.4). On price and device support there is nothing between them.

Both are free to download. Calc sells 3 in-app purchases, starting at $5.99 per 7 days. Ptilop.sys asks for nothing beyond the download.

## The numbers

| Metric | Calc | Ptilop.sys |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ptilopsys/id6778647718/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | — | Weekly |
| Monetization | — | Free |
| Size | 110 MB | 211 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Manohar Varu](https://appshunter.io/developer/1741749388) | [Soon-woo Kwon](https://appshunter.io/developer/6778647721) |

## What reviewers say

### Calc

[App page](https://appshunter.io/ios/app/calc-ai-math-problem-solver/id6503810403)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ai Math Problem Solve One Week | $5.99 | per 7 days |
| Remake Ai Face Swap One Month | $9.99 | per month |
| Ai Math Problem Solve Lifetime | $29.99 | one-time |


### Ptilop.sys

[App page](https://appshunter.io/ios/app/ptilopsys/id6778647718)

This app provides tools and information for players of a popular strategy game. Most functions are available offline, with optional downloads for extra game content. It relies on game data and external APIs for certain features.

**Highlights:** Offline functionality, Downloadable illustrations, Downloadable voicelines, Game information, External API integration

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

**In-app purchases:** none


## Frequently asked questions

### Is Calc free?

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

### Is Ptilop.sys free?

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

### Do Calc or Ptilop.sys have ads?

Calc shows ads; Ptilop.sys does not.

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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.*