# K vs Parrivo

The clearest difference is ads: Parrivo at none against K's shown. K's advantage is iOS requirement (15.0 vs 17.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. K sells 8 in-app purchases, starting at $1.99 per 3 months and Parrivo sells 2 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

K ships an update every 2 weeks, Parrivo every 3 weeks. The most recent releases landed on October 15, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | K | Parrivo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (142 ratings)](https://appshunter.io/ios/app/k-12-math-learning-and-practice/id6446872948/reviews)** | — |
| Number of ratings | **142** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 202 MB | 51 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [DEVWORLD VIETAM COMPANY LIMITED](https://appshunter.io/developer/1867412933) | [Little Elephant Inc](https://appshunter.io/developer/6785287469) |

## What reviewers say

### K

[App page](https://appshunter.io/ios/app/k-12-math-learning-and-practice/id6446872948)

Master K-12 math with interactive games and practice covering algebra, calculus, and more. Features AI-powered explanations, quizzes, and a graphing calculator for on-the-go learning.

**Highlights:** Comprehensive math topics, AI-powered solver with explanations, Interactive quizzes, Smart graphing calculator, Video lessons and tips, Offline practice

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Three Months VIP | $1.99 | per 3 months |
| Learning Premium Monthly Plan | $1.99 | per month |
| One Month VIP | $4.99 | per month |
| Learning Premium HalfYear Plan | $5.99 | per 6 months |
| Learning Premium Annual Plan | $9.99 | per year |
| Six Months VIP | $24.99 | per 6 months |
| 1 Year VIP | $49.99 | per year |
| No ads Pack | $14.99 | one-time |


### Parrivo

[App page](https://appshunter.io/ios/app/parrivo/id6785287467)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Parrivo Premium Monthly | $8.99 | per month |
| Parrivo Premium Yearly | $69.99 | per year |


## Frequently asked questions

### Is K free?

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

### Is Parrivo free?

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

### Do K or Parrivo have ads?

K shows ads; Parrivo does not.

### Which is updated more often, K or Parrivo?

K ships an update every 2 weeks, and Parrivo every 3 weeks. Most recently, K was updated on October 15, 2026 and Parrivo on October 18, 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.*