PDF Scanner vs Guyun
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PDF Scanner
Transform your device into a portable scanner to efficiently digitize documents, IDs, and forms. Extract text with OCR, edit content, and export in various formats like PDF, JPG, Word, or TXT. This app enhances productivity for students, professionals, and anyone needing quick document management.
- Text OCR and extraction
- Batch scanning
- Multi-language translation
- High-definition document scanning
- ID and card scanning
- Form scanning and data analysis
- Electronic signatures and watermarks
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PDF Scanner can turn your device into a powerful portable scanner to help you improve the efficiency of work and daily life. Download this scanner app for free to scan files (OCR) or IDs, edit, translate, save, and copy the recognized content, and share them in PDF, JPG, Word or TXT formats. This tiny multi-function free scanner app is essentials for students, teachers, accountants, realtors, managers, lawyers, or anyone working in a small corporation ---Features--- 【 Text OCR 】 - Scan and recognize various documents, pictures, books, business cards, etc. and extract the desired text, edit, copy and share the recognized content - Support batch scanning and handwriting recognition, and export files in multiple formats after extracting the text accurately - Support multi-language recognition and translate into any language you need, such as English, Japanese, French, German, Russian, Portuguese, Spanish, Italian, etc 【 File Scanning 】 - Scan high-definition documents and save the scanned results as multi-page PDF or JPG files. - Easily scan multiple pages and into one document - Adjust the brightness and chromaticity of scanned documents - Put your electronic signature or watermark on documents 【 IDs scanning 】 - Support the identification and scanning of various documents such as ID cards, bank cards, passports, etc., and generate electronic copies of 1:1 【 Form OCR 】 - Scan tables and forms quickly, precise positioning of table data, intelligent analysis of table text, generate files which can be edited and saved as tables or pictures ---Recommendations--- * Please take a photo to ensure you can get a clear scan * Ensure sufficient light and try to avoid jitter * Try to be within the entire scanning area ---Automatic renew subscriptions--- You will have unlimited access to our recognition service and other services during active subscription period. - The subscriptions are $2.99/week, $5.99/month and$12.49/year. - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. - Subscriptions can be managed by the user and auto-renew can be turned off by going to the user's Account Settings after purchase. - Payment will be charged to iTunes Account at confirmation of purchase. - Account will be charged for subscription within 24-hours prior to the current period at the cost of the chosen package. - No cancellation of the current subscription is allowed during active subscription period Privacy Policy: https://www.camoryapps.com/miaoli/privacy_policy/scanner_en.html Terms Of Services: https://www.camoryapps.com/miaoli/service/scanner_en.html
Guyun
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Guyun keeps your files in object storage you own: Alibaba Cloud OSS, Tencent Cloud COS, Qiniu, Upyun, Backblaze B2, Cloudflare R2, MinIO, or any S3-compatible service. No account system, no server of ours, no telemetry — files go straight from this device to your own bucket. The app provides no cloud space and takes no cut of your storage. ■ Why "your own storage" Most cloud drives keep your files on the vendor's servers, which decides the speed, the capacity and the price. Guyun is the other way round: the bucket, the keys and the bill are yours, and your provider bills storage and traffic at its published rates. Guyun never bills you for either. ■ What it does · Browse and manage: grid or list, sorted by name, date or size; whole-bucket search, not just the folder you are in; new folders, rename, copy, move · Upload and download: from Files or Photos, or a whole folder at once, through a queue you can pause and resume; downloads go to a folder or to Photos · iOS background transfers: files up to 200 MB go to the system as one request and finish even if you switch apps or lock the screen; larger files continue with the background time granted · Progress anywhere: a small pill shows how many transfers are running and how far along they are · Usage ledger: how much Guyun itself moved — today, this month and last month, by bucket and by device, with cellular counted separately on this device. Only this app's transfers, never your provider's bill · Storage size: measure a bucket to get its file count and total size; a large bucket can be finished over several taps, and the result stays on this device · Archive files are marked; the app asks before a restore (how long, billed by your provider, cannot be cancelled), and afterwards preview and download work as usual · Preview: zoom images, play video while it is still loading, open PDF and text · Trash: a delete moves the item to the bucket's own trash folder, where it can be restored or removed for good · Several devices: the same bucket on iPhone, iPad and Mac; hand a configuration over by scanning a code instead of typing keys · Make it yours: an icon per storage, a sidebar you can reorder, and storages you do not need hidden away (back in Settings → Storage service) · Locks: Face ID / Touch ID for the whole app or one storage; transfers keep running while locked, and turning a lock off always asks for authentication first ■ Privacy, in plain terms · No account and no server of ours: the app talks to the storage address you enter, and to nothing else · Access keys live in this device's Keychain, never uploaded to us and never synced through iCloud · Keys leave the device only when you deliberately hand a storage to another device: the handoff code contains them in plain text, so show it only to your own device and treat it like a password · No usage data collected; no third-party SDKs, no analytics, no ads · Face ID / Touch ID is handled by the system, and that data never leaves your device · Both locks are screen gates, not encryption: they keep out someone who picks up your unlocked device ■ Try it without any storage A local demo storage is built in: sample photos, a video and a PDF are generated on device. No account, no keys, no network — browse, preview, upload, rename, copy, move, delete and restore, all without a single credential. ■ What you need A bucket, and a key pair allowed to use only that bucket. Pick the service and place and the app fills in the endpoint and region; you enter the bucket name and the keys (Tencent COS also asks for the APPID ending its bucket names). Guides for every service are on our website, including an Alibaba Cloud template that creates the bucket, the RAM user and the keys at once. ■ Languages Simplified Chinese, Traditional Chinese and English (switch in Settings; applies next time you open the app). Support: contact@airdiode.com Privacy policy: https://www.godar.cn/Guyun-privacy-policy.html
Screenshots
Verdict
The clearest difference is in-app purchases: Guyun at none against PDF Scanner's 11. Guyun also leads on ads (none vs shown) and update cadence (weekly vs fortnightly). PDF Scanner's advantage is iOS requirement (13 vs 17.0). On price 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
Both are free to download. PDF Scanner sells 11 in-app purchases, starting at $2.99 per 7 days. Guyun asks for nothing beyond the download.
PDF Scanner ships an update fortnightly, Guyun weekly. Both last shipped on October 13, 2026.
| Parameter | PDF Scanner | Guyun |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (53 ratings) — better | — |
| Positive reviews | 48.0% of reviews | — |
| Number of ratings | 53 — better | — |
| Update frequency | Fortnightly | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 13 — better | 17.0 |
| Further details — not scored | ||
| Size | 74 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Wuhan Yousigan Technology Co., Ltd | 晖 江 |
In-app purchases
PDF Scanner
- Recognition, unlimite times$2.997 Days
- Recognition, unlimite times$3.991 Month
- Recognition, unlimite times$5.991 Month
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- Recognition, unlimite times1 Month trial$12.991 Year
- 3次按次付费功能使用资格$0.99
- Recognition, unlimite times$4.99
- Recognition, unlimite times$11.99
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- Recognition, unlimite times$15.99
- Two Year Membership$15.99
- Recognition, unlimite times$22.99
- Recognition, unlimite times$29.99
Guyun
No in-app purchases









