# Kid Math vs InterestOS

The clearest difference is update cadence: InterestOS at weekly against Kid Math's every 3 weeks. Kid Math's advantage is iOS requirement (12.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Kid Math sells 4 one-off in-app purchases and InterestOS sells 1 in-app purchase, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Kid Math ships an update every 3 weeks, InterestOS weekly. The most recent releases landed on September 29, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Kid Math | InterestOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/interestos-k5-worksheets/id6790950368/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 42 MB | 13 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tuyen Nguyen](https://appshunter.io/developer/1815134704) | [JAKE ROBERT CRAYCRAFT](https://appshunter.io/developer/6790950370) |

## What reviewers say

### Kid Math

[App page](https://appshunter.io/ios/app/kid-math-pdf-worksheet-maker/id6754006312)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 30 credits | $0.99 | one-time |
| 70 credits | $1.99 | one-time |
| 180 credits | $4.99 | one-time |
| 400 credits | $9.99 | one-time |


### InterestOS

[App page](https://appshunter.io/ios/app/interestos-k5-worksheets/id6790950368)

Personalized, printable learning packs for K-5 students based on their interests. Generates stories, worksheets, and parent guides aligned with academic standards. Offers a free trial and subscription for monthly packs.

**Highlights:** Personalized learning packs, Printable stories and worksheets, Parent guides for easy teaching, Aligned with academic standards, Kid-friendly artwork, Progress tracking

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| InterestOS Premium | $9.99 | per month |


## Frequently asked questions

### Is Kid Math free?

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

### Is InterestOS free?

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

### Do Kid Math or InterestOS have ads?

Neither Kid Math nor InterestOS shows ads.

### Which is updated more often, Kid Math or InterestOS?

Kid Math ships an update every 3 weeks, and InterestOS weekly. Most recently, Kid Math was updated on September 29, 2026 and InterestOS on October 31, 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.*