# Reliability of systems vs Pidgin Dictionary

The clearest difference is update cadence: Pidgin Dictionary at weekly against Reliability of systems's every 18 months. Reliability of systems's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Reliability of systems sells 1 one-off in-app purchase and Pidgin Dictionary sells 4 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Reliability of systems ships an update every 18 months, Pidgin Dictionary weekly. The most recent releases landed on October 10, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Reliability of systems | Pidgin Dictionary |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 18 months | **Weekly** |
| Size | 4 MB | 47 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [Ifeanyi Paul Chibuogwu](https://appshunter.io/developer/6786171045) |

## What reviewers say

### Reliability of systems

[App page](https://appshunter.io/ios/app/reliability-of-systems/id6443837301)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro feature | $1.99 | one-time |


### Pidgin Dictionary

[App page](https://appshunter.io/ios/app/pidgin-dictionary/id6786171043)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month | $4.99 | per month |
| Premium 3-Month | $12.99 | per 3 months |
| Premium 6-Month | $24.99 | per 6 months |
| Premium Yearly | $44.99 | per year |


## Frequently asked questions

### Is Reliability of systems free?

Reliability of systems is free to download, with in-app purchases available.

### Is Pidgin Dictionary free?

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

### Do Reliability of systems or Pidgin Dictionary have ads?

Neither Reliability of systems nor Pidgin Dictionary shows ads.

### Which is updated more often, Reliability of systems or Pidgin Dictionary?

Reliability of systems ships an update every 18 months, and Pidgin Dictionary weekly. Most recently, Reliability of systems was updated on October 10, 2026 and Pidgin Dictionary on October 9, 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.*