# Themis Black Box — The smartest black box app

> Smartphone dashcam app with advanced video recording and GPS features. (iPhone/iPad app by Yeontack Jeong.)

- Source: https://appshunter.io/ios/app/themis-black-box/id1577907867 (this page in markdown: same URL + `.md`)
- Developer: [Yeontack Jeong](https://appshunter.io/developer/334795593)
- Category: Navigation, Photo & Video
- Price: Free
- Age rating: 4+
- Requires: iOS 16.0 · 8 MB
- Languages: American English, Korean
- Released: 2021-07-30
- Data updated: 2026-09-09
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/themis-black-box/id1577907867/reviews.md

## What is Themis Black Box?

Thank you for visiting Themis Black Box app.


* It is *** STRONGLY RECOMMENDED *** to use with a COOLER for smartphones for the following reasons.
  - Due to the nature of the app that processes the video in real time, the device will overheat quickly.
  - Smartphones will be installed and used in harsh environments such as car dashboards.

  In addition, to reduce the effect of car vibration, it is recommended to use a cradle that adsorbs to the windshield.


* Features of Themis

  - Supports 4K, 1080p, 720p recording resolutions and various FPS.

  - Supports UltraWide, Wide, Tele cameras.

  - Supports HDR (High Dynamic Range) recording.

  - Supports OIS (Optical Image Stabilization).

  - Provides clear recorded video frames even when driving in tunnels or at night.
    *** However, the smartphone's autofocus feature may malfunction on roads or in locations that are too dark, or if there are foreign substances (e.g., smudges, rainwater, etc.) on the windshield.

  - Built-in speedometer.

  - Built-in level to help horizontally align the camera.

  - Various information such as date, time, speed and address are added as a watermark at the top of the recorded video.

  - Supports search for location where video recording started by linking with Apple Maps and Google Maps.
    (However, if the region is set to Korea or the language is set to Korean, KakaoMap and NAVER Map are also supported.)

  - Easily switch camera direction to inside or outside the car with a long tap on the screen.

  - Supports starting and stopping recording using volume buttons or Bluetooth shutter.

  - Supports a red mark on the recorded video and the file in the Recorded File Browser screen by double-tapping the screen during video recording so that users can easily find the event they want to remember.

  - Supports displaying a yellow mark on the recorded file the user wants on the Recorded File Browser screen.

  - Supports user-marked recorded files protection function.

  - Supports various screensaver modes.

  - Various device protection functions.

  - Supports AirDrop file transfer.

  - Supports transferring multiple files using data cable and Finder on Mac or iTunes on PC.

  - Supports Worldwide address.

  - Supports easy call function.
     *** However, calls using speakers are currently not supported, and recording is stopped during calls.


For FAQs, please refer to the URL below.
    https://bit.ly/ThemisFAQen


Please drive safely with Themis Black Box.

* In the sample images of the recorded video included in the app screenshot, part of the license plate has been blurred to protect privacy.

## Key features

- 4K, 1080p, 720p recording resolutions
- UltraWide, Wide, Tele camera support
- HDR and OIS recording
- Built-in speedometer and level
- GPS location and speed watermarking
- Easy file management and sharing
- Camera direction switching

## Recent user reviews (10 of 28)

All indexed reviews: https://appshunter.io/ios/app/themis-black-box/id1577907867/reviews.md

### 5/5 — 와우 👍🏻

*2025-11-17*

아주 좋아요 요런 어플 만들어주셔서 감사합니다 😊

**Developer response:** Themis 블랙박스를 이용해 주셔서 감사합니다.

오랜만에 보는 긍정적인 댓글이네요, 감사합니다. ☺️

Themis 블랙박스와 함께 안전운전 하시기 바랍니다.

### 1/5 — 후기

*2025-10-04, version 1.15.3*

사용가치가 없음 삭제함 다른거 사용

### 1/5 — 동의관련

*2025-07-24, version 1.15.2*

사용시 첫번째 면책내용은 다 한국어고
조금 있다가 나오는 데이터 관련 동의는 왜 영어로 되어있나요?

### 1/5 — 최악의 UI UX

*2025-07-23, version 1.15.2*

카메라가 전면 카메라로 전환 됐는데 도저히 후면 카메라로 전환 할 수 있는 방법이 보이지 않음. 버튼도 없고. 정말 최악의 UX를 가지고 있음

### 1/5 — 좆같은

*2025-06-28*

광고 처 봤는데 몇번이나 시간이 안늘어남

### 5/5 — 의견

*2025-06-07*

개발자님 덕분에 잘사용중입니다
근데 얼마전 업데이트이후로 미디어 재생중에 앱실행을 하면 미디어가 재생정지가 됩니다
시간충전이 예전엔 700분정도 되었던거 같은데 400분으로 줄어서 매번 충전에 신경쓰느라 힘들긴하네요 ㅠㅠ

**Developer response:** Themis 블랙박스를 이용해 주셔서 감사합니다.

1. 지난 업데이트에 "볼륨 버튼을 사용하여 녹화 시작 및 정지" 기능이 추가되면서 앱 실행 시에 재생 중인 미디어가 중단되는 현상이 발생하는 것을 확인했습니다. 앱 버전 1.15.1에서 수정하여 업데이트하도록 하겠습니다.

2. 녹화 마일리지는 그 동안에도 최대 400분이었고 더 크게 변경한 적은 없었습니다. 휴게소와 같은 장소에서 휴식을 취하시는 동안 광고를 시청하시는 것을 권해드립니다.

Themis 블랙박스와 함께 안전운전 하시기 바랍니다.

### 5/5 — 녹화 문의

*2025-02-16*

(추가) iOS 최신 버전으로 업데이트하고 사용하니까 괜찮은 것 같습니다. 빠른 응답 감사드립니다. 소중한 앱 감사하게 잘 쓰겠습니다!! 
-------- 

아이폰 공기계에 설치해서 처음 사용해봤는데 너무 신기하고 재밌고 도움되는 어플인것 같습니다. 
첫 녹화는 잘됐는데 두번째 앱 실행시 녹화버튼을 누르면 화면이 정지가 되어버립니다. 앱종료, 폰재시작 해봐도 동일한데 혹시 조치할 방법이 있을까요?

**Developer response:** Themis 블랙박스를 이용해 주셔서 감사합니다.
앱을 설치하여 사용하신 아이폰 기종과 운영체제 버전을 알려주시면 참고하도록 하겠습니다.

구형 아이폰에서 오류가 발생하는 경우, 제가 대부분의 구형 아이폰들을 가지고 있지 않아서 디버깅이 불가한 경우가 많습니다. (테스트 가능한 기종 iPhone 14Pro, iPhone XS, iPhone SE2)
앱은 항상 최신 버전의 iOS에서 테스트하고 있으므로, 사용하셨던 기기가 iOS 18을 지원하지 않는 아이폰이라면 iOS 18이 지원되는 아이폰에 설치해서 사용하시기를 권장합니다.

Themis 블랙박스와 함께 안전운전 하시기 바랍니다

### 1/5 — timestampcamera에 비해 큰 장점이 없음

*2024-11-14*

time stamp camera라는 어플도 함께 쓰고 있는데 위치도 똑같이 지원하고 구글맵도 지원하네요. 둘다 번갈아가면서 써보는데 이 어플 아니면 안된다 정도 특장점은 없는 것 같음요ㅋ

**Developer response:** 차이점을 못느끼면 아무거나 써도 됩니다.

### 5/5 — 아이패드는 언제 지원될까요?

*2024-10-10, version 1.14.11*

아이패드는 언제 지원될까요?

### 5/5 — 이야 블박어플 최고네요

*2024-08-08*

아주 좋습니다

렌즈변경 아이콘을 클릭해서 광각 보통 망원 변경을 1로테이션 돌리면 어플이 종료되는 현상이 있습니다. 

후원금을 통해 하단 광고창 삭제라던가 기능확장이 있었으변 좋겠습니다

그리고 세로 거치시 가로모드촬영이 가능했으면 좋겠어요.

**Developer response:** Themis 블랙박스를 이용해 주셔서 감사합니다.

렌즈변경 아이콘 사용 시 앱이 종료되는 현상은 1.14.10 버전에서 발생하지 않는 것을 확인했습니다. (테스트 기기: iPhone 14 Pro, iPhone XS)
해당 현상이 발생하는지 주기적으로 테스트하여 향후에 문제가 발생하면 수정하여 업데이트 하도록 하겠습니다.

그리고 다양한 아이디어들을 제안해주셔서 감사합니다. 신중하게 검토하여 Themis 블랙박스가 지향하는 방향과 일치한다고 생각되는 아이디어들을 반영하도록 하겠습니다.

Themis 블랙박스와 함께 안전운전 하시기 바랍니다.

## Frequently asked questions about Themis Black Box

### What does Themis Black Box do?

Themis Black Box transforms your smartphone into a sophisticated dashcam. It allows you to record your drives with high-quality video, including features like 4K resolution, HDR, and optical image stabilization. The app also integrates a speedometer and GPS logging to add essential information as watermarks to your recordings.

### What are the key features of Themis Black Box?

Key features include support for various recording resolutions (4K, 1080p, 720p) and camera types (UltraWide, Wide, Tele). It also offers HDR and OIS for clearer footage, a built-in speedometer and level, GPS watermarking with date, time, speed, and address, and easy camera direction switching.

### Is Themis Black Box free to use?

The app is available for free, but it does contain advertisements. It also offers in-app purchases, which may unlock additional features or remove ads, though specific details on these purchases are not provided in the description.

### What are the recommended settings for using Themis Black Box?

It is strongly recommended to use the app with a cooler for your smartphone, as real-time video processing can cause overheating. Additionally, using a windshield-mounted cradle that absorbs vibration is advised for stable recording in harsh car environments.

### How can I manage and share my recorded videos?

The app supports easy file management and sharing. You can search for the location where video recording started by linking with Apple Maps and Google Maps (or KakaoMap and NAVER Map in Korea). It also supports AirDrop for file transfer and transferring multiple files via data cable to Mac or PC.

## Version history (last 5 releases)

### 1.17.4 — 2026-07-14

1. The recording time you can earn by watching ads has increased by 50% compared to before.

2. The UI has been tested to display correctly on the iPhone 17e device.

3. The AdMob library has been updated.

### 1.17.3 — 2026-05-04

The AdMob library has been updated.

### 1.17.2 — 2026-04-22

AdMob 라이브러리가 업데이트 되었습니다.

### 1.17.1 — 2026-02-08

1. When the focus is on a windshield with water droplets, it has been modified to refocus from a distance instead of activating Focus Lock mode.

2. Minor fixes have been applied.

3. The AdMob library has been updated.

### 1.17.0 — 2025-12-10

1. Nighttime brightness has been reduced and image quality has been improved on devices with high camera sensitivity.

2. Recording with the front-facing camera has been improved to record at a more appropriate brightness.

3. On the Recorded Files screen,
  a. Multiple selected files can be sent via AirDrop or saved to the Files or Photos app.
  b. A button has been added to the top of the screen to select all files or by date. Tapping this button while files are selected will deselect all files.
      You can also transfer unselected files individually, even when files are selected.

4. Minor fixes have been implemented.

5. The AdMob library has been updated.

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## Related topics

[themis black box](https://appshunter.io/ios/topics/themis-black-box) · [themis](https://appshunter.io/ios/topics/themis)

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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 2026-09-09.*