# Answer AI vs Libstackz

The clearest difference is in-app purchases: Libstackz at none against Answer AI's 5. Libstackz also leads on ads (none vs shown). Answer AI's advantage is update cadence (weekly vs every 3 months) and iOS requirement (12.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. Answer AI sells 5 in-app purchases, starting at $6.99 per 7 days. Libstackz asks for nothing beyond the download.

Answer AI ships an update weekly, Libstackz every 3 months. The most recent releases landed on October 30, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Answer AI | Libstackz |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (436 ratings)](https://appshunter.io/ios/app/answer-ai-the-math-solver-app/id6446914244/reviews)** | — |
| Number of ratings | **436** | — |
| Positive reviews | 21.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 54 MB | 41 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nin Nguyen](https://appshunter.io/developer/1629552558) | [Ziqx CC](https://appshunter.io/developer/1874658523) |

## What reviewers say

### Answer AI

[App page](https://appshunter.io/ios/app/answer-ai-the-math-solver-app/id6446914244)

This AI-powered app acts as a math solver and homework helper. It can scan math problems from paper or whiteboards, providing instant, step-by-step solutions and detailed explanations for various subjects. It aims to replace the need for expensive tutors.

**Highlights:** Scan math equations from paper or whiteboard, Solve printed or handwritten math problems, Get interactive step-by-step explanations, Covers Math, Biology, Chemistry, Physics, AI-powered homework assistance

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium Access | $6.99 | per 7 days |
| Monthly Subscription | $13.99 | per month |
| Monthly Premium Access | $19.99 | per month |
| Annual Premium Member | $51.99 | per year |
| Lifetime Premium | $79.99 | one-time |

**What reviewers like**

- 👍 Answers all exercises
- 👍 Helps achieve good grades

**What reviewers complain about**

- 💸 Scams money
- 🚫 Limited free usage
- ❌ Frequent ads
- 😵 Kicks users out
- 🤔 Incorrect answers

**Reported bugs**

- App kicks users out
- App stopped working
- Purchase errors
- Incorrect answers for questions
- Charged after cancellation


### Libstackz

[App page](https://appshunter.io/ios/app/libstackz/id6758733568)

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

**In-app purchases:** none


## Frequently asked questions

### Is Answer AI free?

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

### Is Libstackz free?

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

### Do Answer AI or Libstackz have ads?

Answer AI shows ads; Libstackz does not.

### Which is updated more often, Answer AI or Libstackz?

Answer AI ships an update weekly, and Libstackz every 3 months. Most recently, Answer AI was updated on October 30, 2026 and Libstackz on October 23, 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.*