# Catalyst vs Calume

The clearest difference is iOS requirement: Catalyst at 15.1 against Calume's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Catalyst sells 2 in-app purchases, starting at $14.99 per 7 days and Calume sells 3 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 4, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Catalyst | Calume |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/catalyst-commit-and-achieve/id6762204965/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | Subscription | — |
| Size | 97 MB | 23 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [BlackShift LLC](https://appshunter.io/developer/1893358026) | [DANIEL HAVLAS](https://appshunter.io/developer/1889645064) |

## What reviewers say

### Catalyst

[App page](https://appshunter.io/ios/app/catalyst-commit-and-achieve/id6762204965)

This app uses financial consequences to help users achieve their goals. Users commit money to a 30-day cycle, earning it back with a bonus for completion or losing it if they fail. Mastermind groups provide social accountability.

**Highlights:** Financial commitment for goals, Daily reflection tracking, 30-day goal cycles, Mastermind accountability groups, Consequence-based motivation, Goal progress feed

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Catalyst Weekly | $14.99 | per 7 days |
| Catalyst | $49.99 | per month |


### Calume

[App page](https://appshunter.io/ios/app/calume-time-tracker/id6776441027)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chronicle Pro Monthly | $8.99 | per month |
| Chronicle Pro Yearly | $19.99 | per year |
| Chronicle Pro Yearly | $34.99 | per year |


## Frequently asked questions

### Is Catalyst free?

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

### Is Calume free?

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

### Do Catalyst or Calume have ads?

Neither Catalyst nor Calume shows ads.

### Which is updated more often, Catalyst or Calume?

Catalyst ships an update fortnightly, and Calume fortnightly. Most recently, Catalyst was updated on October 4, 2026 and Calume on October 9, 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.*