# Gengou Free vs Doc Align

The clearest difference is in-app purchases: Gengou Free at none against Doc Align's 1. Doc Align's advantage is update cadence (monthly vs every 44 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Doc Align sells 1 one-off in-app purchase. Gengou Free asks for nothing beyond the download.

Gengou Free ships an update every 44 months, Doc Align monthly. The most recent releases landed on October 31, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Gengou Free | Doc Align |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.5 (2 ratings)](https://appshunter.io/ios/app/gengou-free/id284830543/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 84.5% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 44 months | **Monthly** |
| Monetization | Free | — |
| Size | 6 MB | 18 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Masayuki Akamatsu](https://appshunter.io/developer/284722836) | [Kazuhisa Kobayashi](https://appshunter.io/developer/1580882000) |

## What reviewers say

### Gengou Free

[App page](https://appshunter.io/ios/app/gengou-free/id284830543)

Quickly convert between Japanese era names and Christian era years. Features include era and year searching, period and era pickers, and the ability to display the current year in either system. Texts can be shown in Japanese or English.

**Highlights:** Era and year search, Period picker, Era picker, Christian era year picker, Japanese era year picker, Show this year button, Multi-language text display

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

**In-app purchases:** none


### Doc Align

[App page](https://appshunter.io/ios/app/doc-align-perspective-fixer/id6748571837)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


## Frequently asked questions

### Is Gengou Free free?

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

### Is Doc Align free?

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

### Do Gengou Free or Doc Align have ads?

Both Gengou Free and Doc Align show ads.

### Which is updated more often, Gengou Free or Doc Align?

Gengou Free ships an update every 44 months, and Doc Align monthly. Most recently, Gengou Free was updated on October 31, 2026 and Doc Align 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.*