# OneLine：EXIF Frame & Watermark vs KnowCamera

The clearest difference is in-app purchases: KnowCamera at none against OneLine：EXIF Frame & Watermark's 3. OneLine：EXIF Frame & Watermark's advantage is device support (4 vs 2). On price, update cadence, ads and iOS requirement there is nothing between them.

Both are free to download. OneLine：EXIF Frame & Watermark sells 3 in-app purchases, starting at $0.99 per month. KnowCamera asks for nothing beyond the download.

OneLine：EXIF Frame & Watermark ships an update every 3 weeks, KnowCamera fortnightly. The most recent releases landed on October 20, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | OneLine：EXIF Frame & Watermark | KnowCamera |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (16 ratings)](https://appshunter.io/ios/app/onelineexif-frame-and-watermark/id6476151887/reviews)** | — |
| Number of ratings | **16** | — |
| Positive reviews | 87.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 100 MB | 2 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [仲川 刘](https://appshunter.io/developer/1725413036) | [爱问答科技(北京)有限公司](https://appshunter.io/developer/1795400452) |

## What reviewers say

### OneLine：EXIF Frame & Watermark

[App page](https://appshunter.io/ios/app/onelineexif-frame-and-watermark/id6476151887)

Effortlessly add EXIF data, camera logos, and personal signatures to your photos. Choose from elegant designs, minimalist frames, and magazine-style templates to enhance your images with accurate information and a professional aesthetic.

**Highlights:** One-click EXIF information retrieval, Variety of iconic camera logos, Upload personal signatures, Support for multiple image formats, Original image output, lossless, Multiple templates and frames, Batch export up to 100 photos

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Yearly | $6.99 | per year |
| Lifetime | $19.99 | one-time |


### KnowCamera

[App page](https://appshunter.io/ios/app/knowcamera/id6745214202)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OneLine：EXIF Frame & Watermark free?

OneLine：EXIF Frame & Watermark is free to download, with in-app purchases available.

### Is KnowCamera free?

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

### Do OneLine：EXIF Frame & Watermark or KnowCamera have ads?

Neither OneLine：EXIF Frame & Watermark nor KnowCamera shows ads.

### Which is updated more often, OneLine：EXIF Frame & Watermark or KnowCamera?

OneLine：EXIF Frame & Watermark ships an update every 3 weeks, and KnowCamera fortnightly. Most recently, OneLine：EXIF Frame & Watermark was updated on October 20, 2026 and KnowCamera on October 17, 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.*