# Calendar2015 vs Train Clock

The clearest difference is ads: Train Clock at none against Calendar2015's shown. Calendar2015's advantage is update cadence (every 2 months vs every 23 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Calendar2015 ships an update every 2 months, Train Clock every 23 months. The most recent releases landed on November 1, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Calendar2015 | Train Clock |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 23 months |
| Monetization | Ad-supported | — |
| Size | 24 MB | 143 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [HISANORI KAMEYAMA](https://appshunter.io/developer/683895276) | [hiroyuki uchida](https://appshunter.io/developer/669938829) |

## What reviewers say

### Calendar2015

[App page](https://appshunter.io/ios/app/calendar2015/id965053421)

This app displays the current Gregorian and Japanese eras simultaneously, along with the current time. It offers a simple interface with customizable background colors and a quick age calculation feature. It's designed for quick date lookups and conversions.

**Highlights:** Simultaneous Gregorian and Japanese era display, Current time display with analog clock, Customizable background colors, Age calculation, Year difference calculation, Date conversion

**Features:** macOS Compatibility

**In-app purchases:** none


### Train Clock

[App page](https://appshunter.io/ios/app/train-clock/id1097870845)

**In-app purchases:** none


## Frequently asked questions

### Is Calendar2015 free?

Calendar2015 is free to download, with no in-app purchases.

### Is Train Clock free?

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

### Do Calendar2015 or Train Clock have ads?

Calendar2015 shows ads; Train Clock does not.

### Which is updated more often, Calendar2015 or Train Clock?

Calendar2015 ships an update every 2 months, and Train Clock every 23 months. Most recently, Calendar2015 was updated on November 1, 2026 and Train Clock on October 26, 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.*