# Comet vs Evolve

The clearest difference is in-app purchases: Evolve at none against Comet's 3. Evolve also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Comet sells 3 in-app purchases, starting at $9.99 per year. Evolve asks for nothing beyond the download.

Comet ships an update weekly, Evolve every 8 days. The most recent releases landed on September 11, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Comet | Evolve |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 8 days |
| Size | 49 MB | 110 MB |
| Requires iOS | 17.6 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [App Santa LLC](https://appshunter.io/developer/1796930400) | [U.N. University of Nicosia](https://appshunter.io/developer/1872697373) |

## What reviewers say

### Comet

[App page](https://appshunter.io/ios/app/comet-habit-tracker/id6755671978)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly Offer | $9.99 | per year |
| Yearly Plan | $19.99 | per year |
| Lifetime | $29.99 | one-time |


### Evolve

[App page](https://appshunter.io/ios/app/evolve-unic/id6758397510)

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

**In-app purchases:** none


## Frequently asked questions

### Is Comet free?

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

### Is Evolve free?

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

### Do Comet or Evolve have ads?

Comet shows ads; Evolve does not.

### Which is updated more often, Comet or Evolve?

Comet ships an update weekly, and Evolve every 8 days. Most recently, Comet was updated on September 11, 2026 and Evolve on September 30, 2026.

---

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