CHM Sharp vs Recon
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CHM Sharp
This app is a reader for CHM (Microsoft Compiled HTML Help) documents on iOS devices. It allows for file management, searching within documents, and various viewing options. Transfer files easily via Wi-Fi or iTunes.
- CHM document reader
- File sorting and searching
- File management (copy, move, delete)
- Wi-Fi and iTunes file transfer
- In-document search and highlighting
- Pinch-to-zoom support
- Bookmark functionality
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CHM Sharp is CHM (Microsoft Compiled HTML Help) document / ebook reader for iPad, iPhone and iPod touch. * Sorting by file name、create time and file size * Search file(folder) name * View, copy, move, delete, rename, email, zip Compression and unzip files/folders * Extract chm files from compressed .zip/.rar file * Glide deleting function * Transferring files by wifi and itunes file sharing * Email multiple files, folder Supported * catalog view/search、index view/search * full-text、title search, Highlight show * auto detect Text encoding * support bookmarks * Supports pinch to zoom * select all and cancel all * open files from other app * Support all orientations * Universal app
Recon
Capture accurate 3D data using photogrammetry and your device's lidar sensor. Process data locally for privacy or in the cloud. Includes optional scaling with April Tags and exports in e57 format for further analysis.
- Photogrammetry and lidar fusion
- Cloud or on-device processing
- Optional April Tag scaling
- e57 format export
- Privacy-focused local processing
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Recon-3D is a scanning application that fuses photogrammetry and the lidar sensor on the iPhone/iPad Pro. The data can be processed on the cloud or in case of sensitive data, directly on the device only with no data transmitted over the internet. The app provides optional scaling via April Tags which immediately adjusts the scale of the 3D model to match real-world reference measurements. The data can be exported to other programs for inspection, analysis and visualization in e57 format. Privacy Policy: https://www.recon-3d.com/privacypolicy Terms of Use: https://www.recon-3d.com/termsandconditions
Screenshots
Verdict
The clearest difference is rating: Recon at 4.8 against CHM Sharp's 3.8. Recon also leads on ads (none vs shown) and ratings volume (275 vs 11). CHM Sharp's advantage is iOS requirement (14.0 vs 16.1). On price, review sentiment, update cadence and in-app purchases 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
Both are free to download. CHM Sharp sells 1 one-off in-app purchase and Recon sells 5 in-app purchases, starting at $99.99 per month. Whichever you choose, the download price is not the number that matters.
Recon holds the better App Store score, 4.8 against 3.8. That said, the two scores are not equally well evidenced: Recon has 275 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 67% of CHM Sharp's written reviews are positive against 75% of Recon's.
CHM Sharp ships an update every 4 months, Recon every 2 months. The most recent releases landed on October 17, 2026 and October 15, 2026 respectively.
| Parameter | CHM Sharp | Recon |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (11 ratings) | 4.8 (275 ratings) — better |
| Positive reviews | 67.3% of reviews | 75.0% of reviews — better |
| Number of ratings | 11 | 275 — better |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 16.1 |
| Further details — not scored | ||
| Size | 25 MB | 94 MB |
| Age rating | 4+ | 4+ |
| Developer | 锦文 游 | Recon-3D Inc. |
Customer experience
CHM Sharp
Recon
Bugs and requests
CHM Sharp
Not enough reviews yet to summarise bugs or requests.
Recon
Reported bugs
7 issues- Program crashes when hitting save
- App requires update in rural areas without data
- Camera is laggy and slow to update screen after update
- Permission problems block app usage
- App shows 'Oops' screen asking for permission despite all permissions granted
Show 2 moreShow fewer
- Sign up process is not working
- Password recovery is not working
Requested features
1 request- Tool for measuring in the app
In-app purchases
CHM Sharp
- Full Version$0.99
Recon
- Recon3D One Month Subscription$99.991 Month
- Recon3D 1 Year Subscription$599.991 Year
- 5 Additional Uploads$49.99
- 10 Additional Uploads$79.99
- Recon3D 1 Year Subscription$299.99
