# 81App - ONS series software

> Utility app to add Japan's +81 country prefix and provide caller ID. (iPhone/iPad app by 德丰 孔.)

- Source: https://appshunter.io/ios/app/81app-ons-series-software/id1459512942 (this page in markdown: same URL + `.md`)
- Developer: [德丰 孔](https://appshunter.io/developer/896303226)
- Category: Utilities, Reference
- Price: $5.99
- Rating: 3.00/5 from 1 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 14 MB
- Languages: English, Japanese, Chinese
- Released: 2019-04-12
- Data updated: 2026-07-01
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/81app-ons-series-software/id1459512942/reviews.md

## What is 81App?

This app is for users who frequently travel to and from Japan.
You can easily add the +81 country prefix on your phone.
Convenient caller ID.

## Key features

- Add +81 country prefix
- Convenient caller ID
- For Japan travelers

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/81app-ons-series-software/id1459512942/reviews.md

### 3/5 — 这个App与ONS有什么关系？

*2023-03-02*

这个App是干什么的？这个App与ONS有什么关系？

### 3/5 — 屏幕旋转异常以及闪退

*2020-08-09, version 2.4*

在iPad Pro 2018上屏幕重力感应异常，横向持握屏幕显示是上下颠倒的，用《水仙》测试的时候直接闪退，希望作者能修复，你的另一个应用在这个机型也闪退。。。

## Frequently asked questions about 81App

### What is the price of 81App?

81App is a paid application and costs $5.99. This is a one-time purchase for the full functionality of the app.

### What devices does 81App support?

81App is compatible with iPhone, iPad, and iPod devices. It is designed for iOS users.

### When was 81App last updated?

The latest version of 81App, version 2.5, was released on November 29, 2020. The app was initially released on April 12, 2019.

### What is the age rating for 81App?

81App has an age rating of 4+. This indicates it is suitable for users of all ages.

### How does 81App help with international calls?

81App allows users to easily add the +81 country prefix to phone numbers. This is particularly useful for making calls to Japan.

### Does 81App offer caller ID features?

Yes, 81App includes a convenient caller ID feature. This can help users identify incoming calls when traveling.

### What is the user sentiment for 81App based on ratings?

Based on the available data, 81App has a rating of 3.0 stars from 1 rating. This suggests a mixed or neutral user reception.

## Version history (last 1 release)

### 2.5 — 2020-11-29

update time version

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## More apps by 德丰 孔

- [ONSPlayer](https://appshunter.io/ios/app/onsplayer/id1388250129)
- [FindMyIcon](https://appshunter.io/ios/app/findmyicon/id1537306004)
- [RenpyViewer](https://appshunter.io/ios/app/renpyviewer/id1547796767)
- [FlashViewer](https://appshunter.io/ios/app/flashviewer/id1631459446)

All apps by 德丰 孔: https://appshunter.io/developer/896303226

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-01.*