# Flow vs Cala

The clearest difference is ads: Cala at none against Flow's shown. Flow's advantage is update cadence (every 6 weeks vs every 4 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Flow sells 2 in-app purchases, starting at $3.99 per month and Cala sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

Flow ships an update every 6 weeks, Cala every 4 months. The most recent releases landed on September 23, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Flow | Cala |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 6 weeks** | Every 4 months |
| Size | 29 MB | 31 MB |
| Requires iOS | 18.5 | **18.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Emre Can Okten](https://appshunter.io/developer/1847958276) | [Spark Digital Incorporated](https://appshunter.io/developer/1875625754) |

## What reviewers say

### Flow

[App page](https://appshunter.io/ios/app/flow-screen-time-control/id6754340979)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Access | $3.99 | per month |
| All Access | $19.99 | per year |


### Cala

[App page](https://appshunter.io/ios/app/cala-app-blocker-screen-time/id6761075944)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cala Pro — Monthly | $7.99 | per month |
| Cala Pro — Yearly | $59.99 | per year |


## Frequently asked questions

### Is Flow free?

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

### Is Cala free?

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

### Do Flow or Cala have ads?

Flow shows ads; Cala does not.

### Which is updated more often, Flow or Cala?

Flow ships an update every 6 weeks, and Cala every 4 months. Most recently, Flow was updated on September 23, 2026 and Cala on September 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*