# Common Core Math K vs eTRY

The clearest difference is in-app purchases: eTRY at none against Common Core Math K's 18. eTRY also leads on update cadence (every 3 weeks vs every 2 months) and device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Common Core Math K sells 18 in-app purchases, starting at $0.99 per month. eTRY asks for nothing beyond the download.

Common Core Math K ships an update every 2 months, eTRY every 3 weeks. The most recent releases landed on October 2, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Common Core Math K | eTRY |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 56 MB | 18 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [VEENETRONICS INC](https://appshunter.io/developer/1454029044) | [ORBIS, Inc](https://appshunter.io/developer/1396708268) |

## What reviewers say

### Common Core Math K

[App page](https://appshunter.io/ios/app/common-core-math-k-6/id1454029045)

**Features:** macOS Compatibility

**In-app purchases (18)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Student per month | $0.99 | per month |
| Teacher (5 students) monthly | $3.49 | per month |
| Teacher (10 students) monthly | $6.90 | per month |
| School (20 students) monthly | $9.79 | per month |
| 1 Student per year | $9.99 | per year |
| Teacher (15 students) monthly | $10.49 | per month |
| Teacher (20 students) monthly | $13.90 | per month |
| Teacher (25 students) monthly | $17.49 | per month |
| School (40 students) monthly | $19.49 | per month |
| School (50 students) monthly | $24.49 | per month |
| Teacher (5 students) yearly | $35.49 | per year |
| School (20 students) yearly | $69.90 | per year |
| School (30 students) yearly | $104.99 | per year |
| School (40 students) yearly | $139.99 | per year |
| Teacher (20 students) yearly | $141.99 | per year |
| School (50 students) yearly | $173.99 | per year |
| Teacher (25 students) yearly | $176.99 | per year |
| Teacher (30 students) yearly | $214.99 | per year |


### eTRY

[App page](https://appshunter.io/ios/app/etry/id6451458020)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Common Core Math K free?

Common Core Math K is free to download, with in-app purchases available.

### Is eTRY free?

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

### Do Common Core Math K or eTRY have ads?

Neither Common Core Math K nor eTRY shows ads.

### Which is updated more often, Common Core Math K or eTRY?

Common Core Math K ships an update every 2 months, and eTRY every 3 weeks. Most recently, Common Core Math K was updated on October 2, 2026 and eTRY on October 5, 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.*