# Confidence Interval Calc vs Fun Customizable Keyboard

The clearest difference is in-app purchases: Confidence Interval Calc at none against Fun Customizable Keyboard's 4. Confidence Interval Calc also leads on ads (none vs shown) and device support (3 vs 1). On price and update cadence there is nothing between them.

Both are free to download. Fun Customizable Keyboard sells 4 in-app purchases, starting at $2.99 per 7 days. Confidence Interval Calc asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 6 days. The most recent releases landed on October 13, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Confidence Interval Calc | Fun Customizable Keyboard |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 days | Every 6 days |
| Size | 30 MB | 11 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Arsosa Network Inc.](https://appshunter.io/developer/1209042440) | [Majd Salloum](https://appshunter.io/developer/1895728555) |

## What reviewers say

### Confidence Interval Calc

[App page](https://appshunter.io/ios/app/confidence-interval-calc/id6749201174)

**Features:** macOS Compatibility

**In-app purchases:** none


### Fun Customizable Keyboard

[App page](https://appshunter.io/ios/app/fun-customizable-keyboard/id6764313765)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fun Keyboard Pro Weekly | $2.99 | per 7 days |
| Fun Keyboard Pro Monthly | $4.99 | per month |
| Fun Keyboard Pro Yearly | $19.99 | per year |
| Lifetime Pro Access | $39.99 | one-time |


## Frequently asked questions

### Is Confidence Interval Calc free?

Confidence Interval Calc is free to download, with no in-app purchases.

### Is Fun Customizable Keyboard free?

Fun Customizable Keyboard is free to download, with in-app purchases available.

### Do Confidence Interval Calc or Fun Customizable Keyboard have ads?

Fun Customizable Keyboard shows ads; Confidence Interval Calc does not.

### Which is updated more often, Confidence Interval Calc or Fun Customizable Keyboard?

Confidence Interval Calc ships an update every 6 days, and Fun Customizable Keyboard every 6 days. Most recently, Confidence Interval Calc was updated on October 13, 2026 and Fun Customizable Keyboard on October 18, 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.*