# Percentage Value Calculator vs knowra

The clearest difference is update cadence: Percentage Value Calculator at every 3 weeks against knowra's every 7 months. Percentage Value Calculator also leads on device support (3 vs 1) and iOS requirement (15.0 vs 26.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Percentage Value Calculator sells 8 one-off in-app purchases and knowra sells 4 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Percentage Value Calculator ships an update every 3 weeks, knowra every 7 months. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Percentage Value Calculator | knowra |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/percentage-value-calculator/id1497475260/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 7 months |
| Monetization | Free with in-app purchases | — |
| Size | 180 MB | 11 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) | [瑞基 张](https://appshunter.io/developer/1862070303) |

## What reviewers say

### Percentage Value Calculator

[App page](https://appshunter.io/ios/app/percentage-value-calculator/id1497475260)

Easily calculate percentages with detailed step-by-step solutions. Input any two variables to find the third, with support for fractions and decimals. All calculations are saved in a history that can be managed and shared.

**Highlights:** Percentage calculation, Detailed solution steps, History function, Support for fractions and decimals, Option to remove ads, Swipe navigation

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| +30 User Tokens | $0.29 | one-time |
| +1 Convenience Token / 6h, max. +2 | $0.59 | one-time |
| +2 Convenience Tokens / 6h, max. +4 | $0.99 | one-time |
| +150 User Tokens | $0.99 | one-time |
| +300 User Tokens | $1.49 | one-time |
| +4 Convenience Tokens / 6h, max. +8 | $1.59 | one-time |
| Remove Ads | $1.99 | one-time |
| Lifetime Access | $1.99 | one-time |


### knowra

[App page](https://appshunter.io/ios/app/knowra/id6756664484)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $9.99 | per month |
| Pro Monthly | $9.99 | per month |
| Pro Yearly | $99.00 | per year |
| Pro Yearly | $99.99 | per year |


## Frequently asked questions

### Is Percentage Value Calculator free?

Percentage Value Calculator is free to download, with in-app purchases available.

### Is knowra free?

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

### Do Percentage Value Calculator or knowra have ads?

Neither Percentage Value Calculator nor knowra shows ads.

### Which is updated more often, Percentage Value Calculator or knowra?

Percentage Value Calculator ships an update every 3 weeks, and knowra every 7 months. Most recently, Percentage Value Calculator was updated on October 24, 2026 and knowra on October 11, 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.*