# KayWallet vs Convertology

The clearest difference is in-app purchases: KayWallet at none against Convertology's 2. KayWallet also leads on ads (none vs shown) and iOS requirement (15.1 vs 18.6). Convertology's advantage is update cadence (every 6 days vs every 5 weeks). On price and device support there is nothing between them.

Both are free to download. Convertology sells 2 in-app purchases, starting at $3.99 per 7 days. KayWallet asks for nothing beyond the download.

KayWallet ships an update every 5 weeks, Convertology every 6 days. The most recent releases landed on October 20, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | KayWallet | Convertology |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/convertology/id6764801500/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Every 6 days** |
| Monetization | — | Free with in-app purchases |
| Size | 51 MB | 53 MB |
| Requires iOS | **15.1** | 18.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [NTT DATA Peru SAC](https://appshunter.io/developer/1460743211) | [ADNAN STRUJIC](https://appshunter.io/developer/1895920092) |

## What reviewers say

### KayWallet

[App page](https://appshunter.io/ios/app/kaywallet/id1477073898)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Convertology

[App page](https://appshunter.io/ios/app/convertology/id6764801500)

This utility app offers precise unit conversions across a vast range of categories, from everyday measurements to specialized scientific and engineering units. It features a clean interface with quick search, favorites, history, and adjustable precision for efficient use in various settings.

**Highlights:** Extensive unit categories, Quick unit search, Favorites and history, Adjustable result precision, Light and dark mode interface, Copy and share results

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $3.99 | per 7 days |
| Yearly Premium | $29.99 | per year |


## Frequently asked questions

### Is KayWallet free?

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

### Is Convertology free?

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

### Do KayWallet or Convertology have ads?

Convertology shows ads; KayWallet does not.

### Which is updated more often, KayWallet or Convertology?

KayWallet ships an update every 5 weeks, and Convertology every 6 days. Most recently, KayWallet was updated on October 20, 2026 and Convertology on October 19, 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.*