# Cico KeyFinder vs 66 Challenge

The clearest difference is in-app purchases: Cico KeyFinder at none against 66 Challenge's 3. 66 Challenge's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17). On price, update cadence and ads there is nothing between them.

Both are free to download. 66 Challenge sells 3 in-app purchases, starting at $3.99 per month. Cico KeyFinder asks for nothing beyond the download.

Cico KeyFinder ships an update every 3 days, 66 Challenge every 5 days. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Cico KeyFinder | 66 Challenge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/66-challenge/id6758270405/reviews)** |
| Number of ratings | — | **5** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 5 days |
| Monetization | — | Freemium |
| Size | 5 MB | 18 MB |
| Requires iOS | 17 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [JAMIE LEE EVANS WRIGHT](https://appshunter.io/developer/1847928796) | [Moad Ghajjate El Fal](https://appshunter.io/developer/1871890791) |

## What reviewers say

### Cico KeyFinder

[App page](https://appshunter.io/ios/app/cico-keyfinder/id6754335841)

**Features:** macOS Compatibility

**In-app purchases:** none


### 66 Challenge

[App page](https://appshunter.io/ios/app/66-challenge/id6758270405)

Build lasting habits with a science-backed system designed to guide you through a 66-day journey. Track daily progress, visualize your transformation, and stay motivated with social features and achievements. Transform your life one habit at a time.

**Highlights:** Daily habit tracking, Progress visualization, Streak protection, Social feed and squads, Customizable reminders, Achievement badges

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $3.99 | per month |
| Pro Annual | $29.99 | per year |
| Pro Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is Cico KeyFinder free?

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

### Is 66 Challenge free?

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

### Do Cico KeyFinder or 66 Challenge have ads?

Neither Cico KeyFinder nor 66 Challenge shows ads.

### Which is updated more often, Cico KeyFinder or 66 Challenge?

Cico KeyFinder ships an update every 3 days, and 66 Challenge every 5 days. Most recently, Cico KeyFinder was updated on October 25, 2026 and 66 Challenge on October 31, 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.*