# Cali Studio vs Stack

The clearest difference is in-app purchases: Cali Studio at none against Stack's 2. Stack's advantage is update cadence (every 3 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Stack sells 2 in-app purchases, starting at $5.99 per month. Cali Studio asks for nothing beyond the download.

Cali Studio ships an update every 2 months, Stack every 3 days. The most recent releases landed on October 7, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Cali Studio | Stack |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 70 MB | 9 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [Cali Studio](https://appshunter.io/developer/1542086766) | [Henry Hinge](https://appshunter.io/developer/6784458312) |

## What reviewers say

### Cali Studio

[App page](https://appshunter.io/ios/app/cali-studio/id1542086524)

Manage your studio bookings and memberships effortlessly. Discover available classes, review past and upcoming sessions, monitor your progress, and set fitness goals. Access exclusive app-only deals on memberships and merchandise.

**Highlights:** Streamline booking process, Manage memberships, Navigate available classes, View past & future sessions, Track consistency, Set achievable goals, Exclusive app-only offers

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

**In-app purchases:** none


### Stack

[App page](https://appshunter.io/ios/app/stack-supplement-tracker/id6784458310)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stack Pro | $5.99 | per month |
| Stack Pro | $39.99 | per year |


## Frequently asked questions

### Is Cali Studio free?

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

### Is Stack free?

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

### Do Cali Studio or Stack have ads?

Neither Cali Studio nor Stack shows ads.

### Which is updated more often, Cali Studio or Stack?

Cali Studio ships an update every 2 months, and Stack every 3 days. Most recently, Cali Studio was updated on October 7, 2026 and Stack on October 10, 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.*