# KNOWBODY vs Simple Power Grader

The clearest difference is update cadence: KNOWBODY at every 3 weeks against Simple Power Grader's every 2 months. KNOWBODY also leads on review sentiment (67% vs 56%) and iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. KNOWBODY sells 1 one-off in-app purchase and Simple Power Grader sells 2 in-app purchases, starting at $2.49 per 6 months. Whichever you choose, the download price is not the number that matters.

KNOWBODY ships an update every 3 weeks, Simple Power Grader every 2 months. The most recent releases landed on October 24, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | KNOWBODY | Simple Power Grader |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **66.7% of reviews** | 55.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 138 MB | 79 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [KNOWBODY UG (haftungsbeschränkt)](https://appshunter.io/developer/1562328903) | [Lehrerfreund GmbH](https://appshunter.io/developer/1560701914) |

## What reviewers say

### KNOWBODY

[App page](https://appshunter.io/ios/app/knowbody/id1562328901)

This app provides sexual education resources for secondary schools, suitable for all German states from 6th grade. Teachers and interested individuals can test it for free for 8 days.

**Highlights:** Sexual education content, Suitable for secondary schools (6th grade+), Bundensland-independent, Free 8-day trial for teachers, Login with Univention (Bremen)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Familienlizenz | $12.99 | one-time |


### Simple Power Grader

[App page](https://appshunter.io/ios/app/simple-power-grader/id1603627742)

This app offers a simple yet powerful tool for educators to create and apply custom grading scales. It supports various international grading systems and allows for detailed customization of how scores are translated into grades, ensuring fair and transparent evaluation.

**Highlights:** Customizable grading scales, Supports international grading systems, Option to count half points, Error grading scale option, Multiple output formats for grades, Save and export grading scales (Pro), Data protection focused

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Abonnement (6 Monate) | $2.49 | per 6 months |
| Pro Abonnement (1 Jahr) | $4.49 | per year |


## Frequently asked questions

### Is KNOWBODY free?

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

### Is Simple Power Grader free?

Simple Power Grader is free to download, with in-app purchases available.

### Do KNOWBODY or Simple Power Grader have ads?

Neither KNOWBODY nor Simple Power Grader shows ads.

### Which is updated more often, KNOWBODY or Simple Power Grader?

KNOWBODY ships an update every 3 weeks, and Simple Power Grader every 2 months. Most recently, KNOWBODY was updated on October 24, 2026 and Simple Power Grader on September 22, 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.*