# CPPD vs Chronicle for Research

The clearest difference is update cadence: Chronicle for Research at every 4 weeks against CPPD's every 8 months. CPPD's advantage is iOS requirement (12.0 vs 14.0). 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.

CPPD ships an update every 8 months, Chronicle for Research every 4 weeks. The most recent releases landed on September 16, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | CPPD | Chronicle for Research |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 4 weeks** |
| Size | 174 MB | 4 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cornhusker Public Power District](https://appshunter.io/developer/1481624342) | [Methodic, Inc.](https://appshunter.io/developer/1618305706) |

## What reviewers say

### CPPD

[App page](https://appshunter.io/ios/app/cppd/id1481624343)

**Features:** macOS Compatibility

**In-app purchases:** none


### Chronicle for Research

[App page](https://appshunter.io/ios/app/chronicle-for-research/id1618305704)

**In-app purchases:** none


## Frequently asked questions

### Is CPPD free?

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

### Is Chronicle for Research free?

Chronicle for Research is free to download, with no in-app purchases.

### Do CPPD or Chronicle for Research have ads?

Neither CPPD nor Chronicle for Research shows ads.

### Which is updated more often, CPPD or Chronicle for Research?

CPPD ships an update every 8 months, and Chronicle for Research every 4 weeks. Most recently, CPPD was updated on September 16, 2026 and Chronicle for Research on September 17, 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.*