Expert Sign vs Yunfrogs
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Expert Sign
Easily sign documents and photos directly on your iPhone. Save your signature and apply it to PDFs or images, then share them instantly. Ideal for quick document signing on the go.
- Draw and save multiple signatures
- Import handwritten signatures
- Sign PDFs and document photos
- Add dates with one tap
- Resize and position signatures
- Export via email or other apps
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Sign any document in seconds. Expert Sign turns your iPhone into a pocket signature pad: save your signature once, drop it on any PDF or photo of a document, and send it straight back. Open the file, sign it, share it. That is the whole app. WHAT YOU CAN DO • Draw your signature with your finger, in black or blue ink • Keep several signatures and initials, and pick the right one in a tap • Import a photo of your handwritten signature: the paper background is removed automatically • Sign PDF documents and photos of paper documents • Add today's date in one tap • Drag to place each signature exactly where it belongs, pull the corner to resize it • Duplicate a signature to initial every page • Import from Files, Photos, Mail, iCloud Drive or any cloud service • Import straight from Expert Scan to sign what you just scanned • Export by email, by message, or into any other app BUILT FOR PAPERWORK THAT WILL NOT WAIT Rental agreements, NDAs, school forms, delivery notes, invoices, consent forms, employment contracts: anything that arrives as a PDF and has to go back signed today. PRIVATE BY DESIGN Your documents are signed right on your iPhone. They are never uploaded to our servers. FREE TO TRY Sign your first 10 documents for free. Expert Sign Plus, a one-time purchase, unlocks unlimited signing and removes ads. Part of the Expert suite, alongside Expert Scan. Questions or ideas: https://jmapp.com
Yunfrogs
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Alarm Device Management, Alarm Settings, Night Light Settings.
Screenshots
Verdict
The clearest difference is in-app purchases: Yunfrogs at none against Expert Sign's 1. Yunfrogs also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.0). Expert Sign's advantage is update cadence (every 2 months vs every 5 months). 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. Expert Sign sells 1 one-off in-app purchase. Yunfrogs asks for nothing beyond the download.
Expert Sign ships an update every 2 months, Yunfrogs every 5 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.
| Parameter | Expert Sign | Yunfrogs |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (7 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 7 — better | — |
| Update frequency | Every 2 months — better | Every 5 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 15 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Julien meyer | Xiamen Zhengdong Electronics Co., Ltd |
In-app purchases
Expert Sign
- Expert Sign$1.99
Yunfrogs
No in-app purchases
