# Stackable Studio vs HammerAI

Stackable Studio and HammerAI are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Stackable Studio sells 2 in-app purchases, starting at $9.99 per month and HammerAI sells 10 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Stackable Studio | HammerAI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.2 (17 ratings)](https://appshunter.io/ios/app/hammerai/id6770699376/reviews)** |
| Number of ratings | — | **17** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 50 MB | 33 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Qasim Khan](https://appshunter.io/developer/1896732302) | [HammerAI](https://appshunter.io/developer/1896761542) |

## What reviewers say

### Stackable Studio

[App page](https://appshunter.io/ios/app/stackable-studio/id6770308503)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stackable Subscription | $9.99 | per month |
| Stackable Pro | $99.99 | per year |


### HammerAI

[App page](https://appshunter.io/ios/app/hammerai/id6770699376)

Engage in immersive roleplay with thousands of AI characters, create your own stories, and generate unique images. This app prioritizes user privacy by allowing local storage of chats and characters, with no ads or tracking.

**Highlights:** Thousands of AI characters, AI roleplay and character chat, Group chats with multiple AIs, Co-author stories with AI, AI image generation, Text-to-speech with 300+ voices, Local chat and character storage

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Advanced Weekly | $4.99 | per 7 days |
| Ultimate Weekly | $9.99 | per 7 days |
| Advanced Monthly | $17.99 | per month |
| Starter Quarterly | $23.99 | per 3 months |
| Ultimate Monthly | $34.99 | per month |
| Advanced Quarterly | $47.99 | per 3 months |
| Starter Yearly | $84.99 | per year |
| Ultimate Quarterly | $94.99 | per 3 months |
| Advanced Yearly | $169.99 | per year |
| Ultimate Yearly | $329.99 | per year |


## Frequently asked questions

### Is Stackable Studio free?

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

### Is HammerAI free?

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

### Do Stackable Studio or HammerAI have ads?

Neither Stackable Studio nor HammerAI shows ads.

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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.*