ZJTY vs HappyLens
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ZJTY
Read full descriptionHide full description
ZJTY App让用户可以通过连接行车记录仪的WiFi获取行车记录仪拍摄的图片、视频资源,并进行一定的处理满足用户对资源的使用场景,比如取证、分享等。
HappyLens
This app helps you straighten and clean up photos of artwork, documents, and notes. It automatically detects edges, corrects perspective, and preserves original textures and colors. Processed images are saved locally without uploading to the cloud.
- Automatic edge detection
- Manual corner adjustment
- Perspective correction
- Artwork texture preservation
- Ink Wash mode
- Document mode
- Brightness and contrast fine-tuning
Read full descriptionHide full description
Straighten artwork, homework, notes, and document photos. Clean the background, preserve paper texture, and save a new photo. All processing stays on your device. Description Happy Lens is a lightweight local photo cleanup tool for artwork, homework, handwritten pages, notes, and document photos. When you take a quick photo of a paper sheet or artwork, the image is often tilted, uneven, shadowed, or surrounded by a messy background. Some scanner apps also process images too heavily, losing color, paper texture, and real brush or pencil details. Happy Lens focuses on one photo at a time, making the cleanup flow simple and fast. Choose a photo from your library, and Happy Lens will detect the main paper or artwork area, crop the edges, and correct perspective so the result looks more straight and natural. If automatic detection is not perfect, you can manually drag the four corners to adjust the frame. Key features: Detect artwork or document edges automatically Adjust the four-corner frame by hand Correct perspective for tilted photos Artwork mode to preserve texture, color, and brush details Ink Wash mode for soft ink tones and paper highlights Document mode for cleaner pages and clearer lines Fine-tune brightness, contrast, and background cleanup Press and hold to compare with the original photo Export results as new photos without replacing the original Happy Lens does not require an account and does not rely on cloud processing. Your image processing stays on your device, and your photos are not uploaded to a server. Great for: Children’s drawings, crafts, homework, and practice sheets Classroom handouts, paper notices, handwritten notes, and sketches Artwork, ink wash, calligraphy, and document photos taken at an angle Turning a quick photo into a cleaner image for saving or sharing Happy Lens is not a complex scanning, OCR, or file management app. It is a quiet, focused tool for straightening one photo, cleaning the background, preserving the original feel, and saving the result back to Photos.
Screenshots
Verdict
The clearest difference is price: ZJTY at Free against HappyLens's $1.99. ZJTY also leads on iOS requirement (10.0 vs 17.0). HappyLens's advantage is update cadence (every 2 months vs every 9 months). On ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
ZJTY is free to download; HappyLens costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ZJTY ships an update every 9 months, HappyLens every 2 months. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.
| Parameter | ZJTY | HappyLens |
|---|---|---|
| Price | Free — better | $1.99 |
| Positive reviews | — | 100.0% of reviews |
| Update frequency | Every 9 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 10.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 50 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Shenzhen Xiaozhen Technology Co.,Ltd. | 常坤 赵 |
In-app purchases
ZJTY
No in-app purchases
HappyLens
No in-app purchases









