# Planviah vs CatDo

The clearest difference is in-app purchases: CatDo at none against Planviah's 2. CatDo also leads on ads (none vs shown) and iOS requirement (15.0 vs 18.0). Planviah's advantage is update cadence (every 9 days vs every 10 months). On price and device support there is nothing between them.

Both are free to download. Planviah sells 2 in-app purchases, starting at $7.99 per month. CatDo asks for nothing beyond the download.

Planviah ships an update every 9 days, CatDo every 10 months. The most recent releases landed on October 10, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Planviah | CatDo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 9 days** | Every 10 months |
| Size | 42 MB | 117 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Planviah](https://appshunter.io/developer/1811786765) | [Dinu Stefan Rusu](https://appshunter.io/developer/1697162965) |

## What reviewers say

### Planviah

[App page](https://appshunter.io/ios/app/planviah-student-planner/id6745328349)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $7.99 | per month |
| Year | $59.99 | per year |


### CatDo

[App page](https://appshunter.io/ios/app/catdo-your-study-buddy/id6751812918)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Planviah free?

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

### Is CatDo free?

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

### Do Planviah or CatDo have ads?

Planviah shows ads; CatDo does not.

### Which is updated more often, Planviah or CatDo?

Planviah ships an update every 9 days, and CatDo every 10 months. Most recently, Planviah was updated on October 10, 2026 and CatDo on October 7, 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.*