Comparison

Sphinx Data vs eSign App

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Sphinx Data

Features
Read full description

The Sphinx Data App is used by Sphinx customers to have easy access to their online content

About

eSign App

Features
Read full description

Sign any document in seconds, and turn any photo into a clean PDF. Draw your signature once and eSign App places it perfectly on any PDF, contract, lease, or form. Need to send a signed scan? Snap a photo and it becomes a sharp, professional PDF you can sign and share in one flow. SIGN ANYTHING, FAST • Draw, save, and reuse your signature and initials • Smart placement finds signature lines for you • Fill forms, add dates, and check boxes with no printer and no scanner PHOTO TO PDF IN ONE TAP • Convert photos, screenshots, and images to PDF instantly • Multi-page documents from your camera roll • Auto edge detection for paper documents ORGANIZED AND PRIVATE • Folders keep contracts, receipts, and IDs sorted • Everything stays on your device, offline first • iCloud sync available with Premium Built for the moments that cannot wait: the lease due tonight, the permission slip in the morning, the contract sitting in your inbox. Download eSign App and sign your next document in under a minute. Privacy: https://www.pixelport.io/app/photo-to-pdf-convert-scan-edit/privacy-policy Terms: https://www.pixelport.io/app/photo-to-pdf-convert-scan-edit/terms-conditions EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Sphinx Data4 screens
eSign App4 screens

Verdict

The call

The clearest difference is in-app purchases: Sphinx Data at none against eSign App's 3. Sphinx Data also leads on update cadence (fortnightly vs every 11 months) and device support (3 vs 1). On price and ads there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. eSign App sells 3 in-app purchases, starting at $7.99 per month. Sphinx Data asks for nothing beyond the download.

UpkeepUpdate frequency

Sphinx Data ships an update fortnightly, eSign App every 11 months. The most recent releases landed on October 8, 2026 and October 14, 2026 respectively.

Scorecard4 real differences Ā· 2 level
Sphinx Data versus eSign App: the parameters behind the verdict, then further details
ParameterSphinx DataeSign App
PriceFreeFree
Update frequencyFortnightly — betterEvery 11 months
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.0 — better17.6
Further details — not scored
Size32 MB12 MB
Age rating17+4+
DeveloperSphinx ApSPixelPort LLC

In-app purchases

None

Sphinx Data

No in-app purchases

3 purchases

eSign App

Subscriptions2
  • PDF Pro - Monthly$7.991 Month
  • PDF Pro - Annual$39.991 Year
One-time1
  • PDF Pro - Lifetime$89.99

Questions

Is Sphinx Data free?
Sphinx Data is free to download, with no in-app purchases.
Is eSign App free?
eSign App is free to download, with in-app purchases available.
Do Sphinx Data or eSign App have ads?
Neither Sphinx Data nor eSign App shows ads.
Which is updated more often, Sphinx Data or eSign App?
Sphinx Data ships an update fortnightly, and eSign App every 11 months. Most recently, Sphinx Data was updated on October 8, 2026 and eSign App on October 14, 2026.

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