# NGC RedVox: Audio Sky Atlas — Deep-sky objects and stars

> Japanese astronomical catalog with voice search and observation list creation. (iPhone/iPad app by SOICHIRO NISHI.)

- Source: https://appshunter.io/ios/app/ngc-redvox-audio-sky-atlas/id6770306109 (this page in markdown: same URL + `.md`)
- Developer: [SOICHIRO NISHI](https://appshunter.io/developer/1896732181)
- Category: Reference, Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.0 · 230 MB
- Languages: Japanese, American English
- Released: 2026-05-22
- Data updated: 2026-11-05
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/ngc-redvox-audio-sky-atlas/id6770306109/reviews.md

## What is NGC RedVox?

There is a faint glow in your eyepiece. You know its catalog number, but what are you looking at? How far has that light traveled?

NGC Sky Atlas puts object information within earshot. Search for a target, open its details and listen, with less time spent reading a bright screen. Built by an amateur astronomer for nights at the telescope, it combines a deep-sky reference with practical observing filters.

EXPLORE THE CATALOG
Browse 7,905 deep-sky catalog entries and 15,537 stars down to magnitude 7.0. All 110 Messier objects are included, alongside NGC, IC and Melotte entries, galaxies, nebulae, clusters and double stars. The catalog also preserves 499 historical NGC entries with notes explaining duplicates, misidentifications and missing objects.

English object information includes catalog specifications and, where available, longer descriptions. Images can be opened for a closer look. Search by catalog number, common name, constellation or words in a description.

LISTEN IN ENGLISH OR JAPANESE
Choose English, Japanese or your system language. The interface, search and narration follow that choice. English narration uses the voices available on your device. Japanese narration offers a choice of voices, with downloadable audio for supported descriptions.

Use the microphone or double-tap to start voice search. Say a constellation name or a catalog number such as M31 or NGC 224, then choose a result.

PLAN YOUR OBSERVING SESSION
Combine filters for constellation, object type, catalog, magnitude, angular size, double-star separation and visibility. Set your observing location, telescope aperture and sky conditions to narrow the list. Sort the results and return to recently viewed objects through history.

MADE FOR DARK SKIES
The red-on-black night mode keeps the interface subdued. A daytime appearance is also available. Large controls and a compact workflow help you spend more time observing.

OPTIONAL SKY AND TELESCOPE MODES
Point the rear camera clearly upward to look up nearby constellations. Sensor status is shown on screen and tracking can be stopped directly. Connect a compatible Nexus DSC or LX200 telescope controller over Wi-Fi to find objects near its pointing direction. These experimental features are optional; a telescope connection is not required to browse the catalog.

OFFLINE REFERENCE
Catalog data, descriptions and images are included in the app. Download Japanese audio before traveling to use it offline. Speech recognition, purchases and audio downloads may require an internet connection.

TRY IT, THEN UNLOCK ONCE
Download for free and open details for up to 10 objects. A single non-consumable in-app purchase unlocks the full catalog's details, images, narration and observing tools. There is no monthly or annual subscription. The purchase is shared across the Japanese and English interfaces.

SOURCES AND PRIVACY
Catalog information draws on sources including OpenNGC, HYG, VizieR and WDS; descriptions draw primarily on Wikipedia. Images include material from Pan-STARRS, DSS2, Wikipedia, NASA and JWST. Source credits are available in the app. Location is used on your device for observing-site and sky-direction calculations.

Header image: NGC 3324, “Cosmic Cliffs,” observed in infrared by JWST/NIRCam. Image: NASA, ESA, CSA, STScI. Resized and cropped for display.
https://science.nasa.gov/asset/webb/cosmic-cliffs-in-the-carina-nebula-nircam-image/

## Key features

- Japanese voice search for celestial objects
- Extensive database of nebulae, clusters, galaxies, and stars
- Customizable observation lists
- Night mode for dark adaptation
- Telescope connectivity (beta)
- Detailed celestial object information

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Full Catalog Unlock | $14.99 | one-time |


## Is NGC RedVox safe?

Not enough ratings yet to assess NGC RedVox.

## Is NGC RedVox legit?

NGC RedVox: Audio Sky Atlas appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for NGC RedVox is 65 out of 100 points across 7 verification signals from App Store and developer data.

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/ngc-redvox-audio-sky-atlas/id6770306109/reviews.md

### 4/5 — 無料版だと10件の閲覧まで。

*2026-07-08*

紹介の通り赤カラー、読み上げやジェスチャースワイプの操作、現在地からなどボリューミーな多機能。

買い切りとして考えるなら秀逸。ハマってきた人向けといった所感。

## Frequently asked questions about NGC RedVox

### What celestial objects are included in NGC全天星空図鑑?

NGC全天星空図鑑 includes 7,910 celestial objects from the NGC and Messier catalogs, plus 15,537 HIP stars. This covers all Messier and NGC objects, major Mel and IC objects, and all stars brighter than magnitude 7, including various types of nebulae, clusters, galaxies, and double stars.

### Can I search for celestial objects by common names or keywords?

Yes, NGC全天星空図鑑 allows full-text searching of descriptions. You can search by celestial object name, catalog number, or even keywords from their descriptions, making it easy to find objects even if you don't know their formal names.

### How does the observation list feature work in NGC全天星空図鑑?

The app allows you to create personalized observation lists by combining various filters such as text search, constellation, object type, magnitude, size, magnification, visibility, aperture, and sky darkness. This helps you select specific targets for your viewing sessions.

### Does NGC全天星空図鑑 support voice commands?

Yes, NGC全天星空図鑑 supports Japanese voice commands for searching celestial objects. You can speak object names, catalog numbers, or keywords to quickly find and get information about them.

### Is NGC全天星空図鑑 suitable for use in dark conditions?

Yes, NGC全天星空図鑑 includes a standard night mode to preserve dark adaptation. The buttons are designed to be large and the operation is simple, aiming for usability even while wearing gloves.

### Can NGC全天星空図鑑 connect to telescopes?

Yes, NGC全天星空図鑑 offers telescope連携 (connectivity) with Nexus DSC and LX200 compatible telescopes via WiFi. This feature is currently in beta and allows the app to display celestial objects near the direction your telescope is pointing.

### What are the sources for the celestial object data and images in NGC全天星空図鑑?

The app uses images collected from sources like Pan-STARRS, DSS2, Wikipedia, NASA, and JWST. Celestial object data, such as distance and diameter, are primarily sourced from OpenNGC, HYG, VizieR, and WDS, with descriptive text from Wikipedia.

### Is NGC全天星空図鑑 available on multiple platforms?

Based on the provided data, NGC全天星空図鑑 is supported on iPhone and iPad, indicating compatibility with iOS devices.

## Version history (last 5 releases)

### 1.1.9 — 2026-10-21

Updated App Store links to the official website, support, and privacy policy for each listing language.

### 1.1.8 — 2026-10-18

- Added complete English interface support, including settings, filters, search, history, voice search and spoken object information.
- Added reviewed English descriptions and improved English object and constellation searches.
- Reduced repeated list calculations and duplicate image processing during scrolling.
- Made sky-pointing sensor status and the stop control clearer. Automatic sky pointing now starts only when the rear camera is aimed clearly upward.

### 1.1.7 — 2026-08-04

細かな修正を行いました。

### 1.1.6 — 2026-07-09

・NGC/Messier/Melotte等、全天体の距離、直径、等級、速度などの説明を外部資料と再照合し、精査しました。
・本文と読み上げ内の星座名、英語表記、URL混入、編集メモ混入を修正しました。
・恒星の日本語名とカナ表記を拡充し、一部の読み上げ重複を修正しました。
・ヒアデス星団など、別カタログ番号で統合された天体の表示を分かりやすくしました。
・WDS重星の未測定位置角や不要なバイエル原表記が表示される問題を修正しました。

### 1.1.5 — 2026-06-26

・倍率目安で並べ替えられる「推奨倍率順」を追加しました。
・NGC図鑑で抽出したリストをSkySafariの観測リストにエクスポート出来るようになりました。
・一部天体画像、読み上げ音声、TTS再生まわりの不具合を修正しました。

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## More apps by SOICHIRO NISHI

- [Moon Atlas: Lunar Field Guide](https://appshunter.io/ios/app/moon-atlas-lunar-field-guide/id6777560396)
- [Mars Atlas: 3D Map & Rovers](https://appshunter.io/ios/app/mars-atlas-3d-map-and-rovers/id6778795946)

All apps by SOICHIRO NISHI: https://appshunter.io/developer/1896732181

## Related topics

[ngc](https://appshunter.io/ios/topics/ngc)

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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 2026-11-05.*