# Nanzoo Clock vs Main Idea

The clearest difference is update cadence: Nanzoo Clock at every 10 days against Main Idea's every 3 months. Nanzoo Clock also leads on review sentiment (100% vs 71%). Main Idea's advantage is device support. On price, in-app purchases, monetization model and iOS requirement there is nothing between them.

Both are free to download. Nanzoo Clock sells 1 one-off in-app purchase and Main Idea sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Nanzoo Clock ships an update every 10 days, Main Idea every 3 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Nanzoo Clock | Main Idea |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.8 (19 ratings)](https://appshunter.io/ios/app/main-idea-sentences/id895683482/reviews)** |
| Number of ratings | — | **19** |
| Positive reviews | **100.0% of reviews** | 71.4% of reviews |
| In-app purchases | Yes | Yes |
| Ads | — | No |
| Update frequency | **Every 10 days** | Every 3 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 38 MB | 22 MB |
| Requires iOS | 13.0 | **12.2** |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Takafumi Sasaki](https://appshunter.io/developer/625986968) | [Janine Toole](https://appshunter.io/developer/839832427) |

## What reviewers say

### Nanzoo Clock

[App page](https://appshunter.io/ios/app/nanzoo-clock/id625986965)

This educational app teaches children aged 3-7 how to tell time using interactive clock activities. Users can select animal clocks and practice setting and reading time with adjustable difficulty levels.

**Highlights:** Interactive animal clocks, Set the time activity, Read the time activity, Adjustable difficulty levels, Parent gate for purchases, No ads or tracking

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Level Unlock | $0.99 | one-time |


### Main Idea

[App page](https://appshunter.io/ios/app/main-idea-sentences/id895683482)

This app helps children in grades 2-5 develop reading comprehension skills by focusing on identifying the main idea of sentences. It uses a fun, game-like approach with step-by-step learning and rewards to keep kids motivated. Designed by educators, it's suitable for both typical and special needs children.

**Highlights:** Step-by-step skill building, Game-like environment, Frustration-free learning, Reward Center for motivation, Parental review and reporting, Over 600 examples, Designed by teachers and researchers

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to 2 Users | $1.99 | one-time |
| Access All Levels | $2.99 | one-time |
| Up to 10 Users | $2.99 | one-time |


## Frequently asked questions

### Is Nanzoo Clock free?

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

### Is Main Idea free?

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

### Which is updated more often, Nanzoo Clock or Main Idea?

Nanzoo Clock ships an update every 10 days, and Main Idea every 3 months. Most recently, Nanzoo Clock was updated on November 1, 2026 and Main Idea on November 2, 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.*