Comparison

Document Sign vs Light Meter + SensorArray

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

Head to head
About

Document Sign

Features
Read full description

Sign Now is an e-Signature app to use to edit PDFs and signatures. "Document Signer" is a mobile app for DocuSign e-signing PDF documents and other formats by one or multiple signers in SignEasy. Then e-sign and send. No printing or faxing is needed. Sign Document How to Work: * Scan paper forms with your camera or open a file from email. * Tap to enter text or checkmarks in form fields. * Fill forms even faster with custom autofill entries. * Easily create your signature with your finger or a stylus. * Apply your signature or initials to the form. * Save forms and send them to others immediately via email. * E-sign documents and send documents for signing without any limits or charges. * Create unique e-signatures using the signature maker. * Upload your document to the document sign mobile app, and with a few taps, collect legally binding signatures. * Sign documents for free. * Get a PDF maker in signNow with Upload & Sign Docs * Create documents and add text, dropdowns, stamps, attachments, and/or electronic e-signature fields to documents in free PDF edit. * Use PDF fill and sign to collect signatures and share signed documents. More benefits of the Fill & Sign-Form Filler e-signature app: * PDF Signature: Sign and send documents using PDF Signer: Sign PDF documents from any device. * DocuSign upload sign docs: Fill and Sign with one click using your Google or Facebook account. Business contract scanner: Fill out PDFs, write on PDF, download, sign documents, and store or print them. * PDF writer and Adobe fill-in free PDF editor scan upload * Sign PDF files to sign contracts and agreements on the go with seamless cross-device syncing. DocuSign eSignature is sent and signed agreements from practically DocuSign upload sign docs anywhere, at any time. We are streamlining how business gets done from any device and anywhere with the free e-sign PDF app. Edit the PDF and do a Digital signature now!!! Subscription Details: * Payment will be charged to the iTunes Account at confirmation of purchase * Subscription automatically renews unless auto-renewal is turned off at least 24 hours before the end of the current period * Account will be charged for renewal within 24 hours before the end of the current period, and the cost of the renewal * No cancellation of the current subscription is allowed during the active subscription period * Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Privacy Policy:- https://www.privacypolicycenter.com/view_custom.php?v=SW5kMm1xRU5yU1piSTlrZUFPaHptQT09&n=Privacy-Policy Terms of Use:- https://www.privacypolicycenter.com/view_custom.php?v=WnJUTWk4dWdyb2U2a3ArNjE3dEhCdz09&n=Terms-Of-Use

About

Light Meter + SensorArray

This app provides hardware-validated light metering for analog film, digital cinema, and audio. It offers features like spot metering, reciprocity compensation for long exposures, and ambient color balance estimation. It's designed for professionals and works offline with a privacy-first approach.

Highlights
  • Hardware-linked spot metering
  • Reciprocity compensation for long exposures
  • Ambient color balance estimation
  • Calibrated sound pressure level monitoring
  • NOAA solar tracking
  • Digital film log
  • Focus stacking assistant
Features
Read full description

Hardware-Validated Light Metering. Zero Subscriptions. Stop guessing and start measuring with SensorArray—a native, high-performance measurement suite that talks directly to your iPhone’s hardware. Built on international standards (APEX) and professional photographic physics, SensorArray delivers high-fidelity data for analog film, digital cinema, and studio audio. HARDWARE-LINKED SPOT METERING Unlike generic apps, SensorArray utilizes raw 14-bit ISP (Image Signal Processor) metadata. By gating measurements to hardware-ready states, we provide a precision Spot Meter that allows you to sample any pixel in your scene for instant, validated exposure data. THE RECIPROCITY SPECIALIST (Schwarzschild) Master long exposures with precision Schwarzschild Power Law compensation. Film Stocks: Integrated curves for 20+ professional stocks from Kodak, Ilford, and Fujifilm. Automatic math: Meter your scene and get the exact compensated exposure time instantly. THE SUPER SENSOR HUD (Mission Control) A unified interface for critical field data: Ambient Color Balance: Professional Kelvin estimation using McCamy’s Approximation for perfect white balance. SPL Sound Monitor: Calibrated Sound Pressure Level monitoring (30dB–100dB baseline) for ambient noise analysis. NOAA Solar Tracker: Official NOAA General Solar Equations for minute-perfect Golden Hour and Sunrise/Sunset tracking. PROFESSIONAL WORKFLOW SUITE: Digital Film Log: Record Aperture, Shutter, ISO, and Lens metadata for every analog frame. Exposure Equivalence: Built on the international APEX (Additive System of Photographic Exposure) standard. Focus Stacking Assistant: Precision math with a 25% safety overlap for macro composites. Field of View Simulator: Visualize focal lengths from 24mm to 135mm with accurate lens compression. BUILT FOR PROFESSIONALS: 100% Offline: Works in studio basements and remote locations. Privacy-First: No accounts. No tracking. No data collection. Native performance: Built with SwiftUI for ultra-fast response and low battery drain. Own your instruments. Join the "Anti-SaaS" movement and download SensorArray today.

Screenshots

Document Sign4 screens
Light Meter + SensorArray4 screens

Verdict

The call

The clearest difference is update cadence: Light Meter + SensorArray at every 2 weeks against Document Sign's every 2 months. On price, ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Document Sign sells 5 in-app purchases, starting at $4.99 per month and Light Meter + SensorArray sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Document Sign ships an update every 2 months, Light Meter + SensorArray every 2 weeks. The most recent releases landed on October 12, 2026 and October 3, 2026 respectively.

Scorecard1 real difference · 9 level
Document Sign versus Light Meter + SensorArray: the parameters behind the verdict, then further details
ParameterDocument SignLight Meter + SensorArray
PriceFreeFree
Rating—3.0 (3 ratings) — better
Positive reviews—50.0% of reviews
Number of ratings—3 — better
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsYesYes
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better16.6
Further details — not scored
Size76 MB19 MB
Age rating17++4
DeveloperSWAINFO SOLUTIONSDynamic Star Pty Ltd

In-app purchases

5 purchases

Document Sign

Subscriptions4
  • Monthly subscription$4.991 Month
  • Weekly Premium Access$6.997 Days
  • Monthly Premium Access$9.991 Month
Show 1 more
  • Yearly Premium Access$39.991 Year
One-time1
  • Lifetime Subscription$9.99
1 purchases

Light Meter + SensorArray

One-time1
  • Access all Pro-tools & calculators$4.99

Questions

Is Document Sign free?
Document Sign is free to download, with in-app purchases available.
Is Light Meter + SensorArray free?
Light Meter + SensorArray is free to download, with in-app purchases available.
Do Document Sign or Light Meter + SensorArray have ads?
Both Document Sign and Light Meter + SensorArray show ads.
Which is updated more often, Document Sign or Light Meter + SensorArray?
Document Sign ships an update every 2 months, and Light Meter + SensorArray every 2 weeks. Most recently, Document Sign was updated on October 12, 2026 and Light Meter + SensorArray on October 3, 2026.

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