# K1くんBIG vs CTRONICS

The clearest difference is update cadence: CTRONICS at every 6 weeks against K1くんBIG's every 15 months. CTRONICS also leads on device support (3 vs 1). On price, ads, in-app purchases 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.

K1くんBIG ships an update every 15 months, CTRONICS every 6 weeks. The most recent releases landed on September 27, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | K1くんBIG | CTRONICS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.6 (60 ratings)](https://appshunter.io/ios/app/ctronics/id1228047553/reviews)** |
| Number of ratings | — | **60** |
| Positive reviews | — | 36.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 6 weeks** |
| Monetization | — | Free |
| Size | 2 MB | 29 MB |
| Requires iOS | 10.0 | **9.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [株式会社アプリラボ](https://appshunter.io/developer/567688645) | [SHENZHEN C-TRONICS CO., LIMITED](https://appshunter.io/developer/1609380590) |

## What reviewers say

### K1くんBIG

[App page](https://appshunter.io/ios/app/k1big/id571889448)

**Features:** macOS Compatibility

**In-app purchases:** none


### CTRONICS

[App page](https://appshunter.io/ios/app/ctronics/id1228047553)

Stream live video from your camera and capture still images directly from the feed. Remotely control your camera's functions for a seamless viewing and recording experience.

**Highlights:** Watch online video, Catch photos on video, Control the camera

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

**In-app purchases:** none

**What reviewers like**

- 👍 Works well with cameras
- 👍 Great motion capture
- 👍 Easy setup for some
- 👍 Good camera quality
- 👍 Added joystick movement

**What reviewers complain about**

- 🐛 Video inversion issues
- 🐛 Playback problems
- 🐛 Authentication issues
- 🐛 Connection difficulties
- 🐛 Poor customer support

**Reported bugs**

- Video seems to be inverted
- Turning iPad does the opposite in landscape
- App in portrait but wrong way round
- Video is landscape but upside down in portrait
- None of the 8 cameras show video in playback

**Requested features**

- Provide a video on YouTube for internet connection
- Add a feature to select all videos at once
- Improve video quality settings
- Allow longer recording times for motion triggers
- Add ability to set alarm off from live view


## Frequently asked questions

### Is K1くんBIG free?

K1くんBIG is free to download, with no in-app purchases.

### Is CTRONICS free?

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

### Do K1くんBIG or CTRONICS have ads?

Neither K1くんBIG nor CTRONICS shows ads.

### Which is updated more often, K1くんBIG or CTRONICS?

K1くんBIG ships an update every 15 months, and CTRONICS every 6 weeks. Most recently, K1くんBIG was updated on September 27, 2026 and CTRONICS on October 4, 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.*