# Quad Calcs vs AIChat Pro

The clearest difference is in-app purchases: Quad Calcs at none against AIChat Pro's 3. AIChat Pro's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. AIChat Pro sells 3 in-app purchases, starting at $4.99 per 7 days. Quad Calcs asks for nothing beyond the download.

Quad Calcs ships an update every 2 weeks, AIChat Pro every 10 days. The most recent releases landed on October 4, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Quad Calcs | AIChat Pro |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 10 days** |
| Monetization | — | Freemium |
| Size | 36 MB | 16 MB |
| Requires iOS | 15.8.3 | **14** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [AIChat Tech Ltd](https://appshunter.io/developer/1808276401) |

## What reviewers say

### Quad Calcs

[App page](https://appshunter.io/ios/app/quad-calcs/id6741951453)

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

**In-app purchases:** none


### AIChat Pro

[App page](https://appshunter.io/ios/app/aichat-protools-powered-by-ai/id6744579150)

This AI-powered assistant offers limitless conversations, acting as a knowledgeable scholar, a creative muse, and an empathetic companion. It provides precise answers, sparks innovation, and offers comfort, enriching your life through AI interactions.

**Highlights:** Knowledgeable AI assistant, Creative idea generation, Empathetic conversational companion, Unlimited AI conversations, Weekly and yearly subscription options

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Membership Week | $4.99 | per 7 days |
| Membership Year | $14.99 | per year |
| Membership Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is Quad Calcs free?

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

### Is AIChat Pro free?

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

### Do Quad Calcs or AIChat Pro have ads?

Quad Calcs shows ads; AIChat Pro does not.

### Which is updated more often, Quad Calcs or AIChat Pro?

Quad Calcs ships an update every 2 weeks, and AIChat Pro every 10 days. Most recently, Quad Calcs was updated on October 4, 2026 and AIChat Pro on October 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.*