# CI Calculator vs Fast Interest Calculator

The clearest difference is update cadence: CI Calculator at daily against Fast Interest Calculator's every 6 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CI Calculator ships an update daily, Fast Interest Calculator every 6 weeks. The most recent releases landed on October 29, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | CI Calculator | Fast Interest Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Daily** | Every 6 weeks |
| Size | 8 MB | 51 MB |
| Requires iOS | 13.2 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Chipsy Information Technology Services](https://appshunter.io/developer/1020887696) | [Camilo Ortegon](https://appshunter.io/developer/993583183) |

## What reviewers say

### CI Calculator

[App page](https://appshunter.io/ios/app/ci-calculator/id1520169419)

**In-app purchases:** none


### Fast Interest Calculator

[App page](https://appshunter.io/ios/app/fast-interest-calculator/id6475480484)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CI Calculator free?

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

### Is Fast Interest Calculator free?

Fast Interest Calculator is free to download, with no in-app purchases.

### Do CI Calculator or Fast Interest Calculator have ads?

Neither CI Calculator nor Fast Interest Calculator shows ads.

### Which is updated more often, CI Calculator or Fast Interest Calculator?

CI Calculator ships an update daily, and Fast Interest Calculator every 6 weeks. Most recently, CI Calculator was updated on October 29, 2026 and Fast Interest Calculator on November 4, 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.*