# Conversion Calculator vs Ding

The clearest difference is in-app purchases: Ding at none against Conversion Calculator's 1. Ding also leads on iOS requirement (14.0 vs 17.0). Conversion Calculator's advantage is update cadence (every 5 weeks vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Conversion Calculator sells 1 one-off in-app purchase. Ding asks for nothing beyond the download.

Conversion Calculator ships an update every 5 weeks, Ding every 4 months. The most recent releases landed on October 14, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Conversion Calculator | Ding |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (157 ratings)](https://appshunter.io/ios/app/conversion-calculator-metric/id6468678523/reviews)** | — |
| Number of ratings | **157** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 4 months |
| Monetization | Free with in-app purchases | — |
| Size | 7 MB | 162 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Collins Cheruiyot](https://appshunter.io/developer/1579009978) | [Wuhan Xiao'an Sida Technology Co., Ltd.](https://appshunter.io/developer/1875456300) |

## What reviewers say

### Conversion Calculator

[App page](https://appshunter.io/ios/app/conversion-calculator-metric/id6468678523)

Easily convert between metric and imperial units for weight, length, temperature, area, and time. This app offers precise, fast results with a clean interface, working offline for daily, travel, school, or work needs.

**Highlights:** Metric and imperial unit conversion, Weight, length, temperature, area, time, Offline functionality, Precise and fast results, Clean and minimal interface, Over 100 measurement types

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited access forever | $8.99 | one-time |


### Ding

[App page](https://appshunter.io/ios/app/ding-go/id6754262711)

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

**In-app purchases:** none


## Frequently asked questions

### Is Conversion Calculator free?

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

### Is Ding free?

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

### Do Conversion Calculator or Ding have ads?

Neither Conversion Calculator nor Ding shows ads.

### Which is updated more often, Conversion Calculator or Ding?

Conversion Calculator ships an update every 5 weeks, and Ding every 4 months. Most recently, Conversion Calculator was updated on October 14, 2026 and Ding on October 12, 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.*