# Percentage vs Carburetor CFM

The clearest difference is price: Carburetor CFM at Free against Percentage's $0.99. Carburetor CFM also leads on update cadence (every 6 days vs every 14 months) and iOS requirement (13.0 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

Carburetor CFM is free to download; Percentage costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Percentage ships an update every 14 months, Carburetor CFM every 6 days. The most recent releases landed on September 20, 2026 and December 3, 2025 respectively.

## The numbers

| Metric | Percentage | Carburetor CFM |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/percentage/id336918440/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 6 days** |
| Monetization | Paid | — |
| Size | 1 MB | 40 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Piet Jonas](https://appshunter.io/developer/288060167) | [STAGE CODING, Travnik](https://appshunter.io/developer/1637068135) |

## What reviewers say

### Percentage

[App page](https://appshunter.io/ios/app/percentage/id336918440)

This utility calculates proportions between two values expressed as percentages. It allows you to find any unknown value in a percentage equation, including percent increases or decreases.

**Highlights:** Calculate any percentage value, Find percent increase, Find percent decrease, Supports iPhone and iPad

**Features:** macOS Compatibility

**In-app purchases:** none


### Carburetor CFM

[App page](https://appshunter.io/ios/app/carburetor-cfm/id1619682005)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Percentage free?

Percentage costs $0.99, with no in-app purchases.

### Is Carburetor CFM free?

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

### Do Percentage or Carburetor CFM have ads?

Neither Percentage nor Carburetor CFM shows ads.

### Which is updated more often, Percentage or Carburetor CFM?

Percentage ships an update every 14 months, and Carburetor CFM every 6 days. Most recently, Percentage was updated on September 20, 2026 and Carburetor CFM on December 3, 2025.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*