Comparison

DiagonalOBDII vs Add Text to PDF

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

Head to head
About

DiagonalOBDII

This app helps mechanics streamline vehicle drive cycles by providing live tracking of emissions monitors and diagnostic trouble codes. It offers precise guidance on drive cycle parameters and instant explanations for trouble codes, ensuring accurate diagnostics and faster vehicle readiness for inspection.

Highlights
  • Live drive cycle monitoring
  • Immediate DTC identification
  • Real-time monitor completion verification
  • Precise drive cycle parameter guidance
  • Professional, easy-to-navigate dashboard
  • Instant trouble code explanations
Read full description

Diagonal is designed specifically for mechanics who want to simplify and speed up vehicle drive cycles. Instantly track emissions monitors and diagnostic trouble codes (DTCs) live, ensuring accurate diagnostics and rapid vehicle readiness for inspection. Key Features: -Live Drive Cycle Monitoring: Clearly see the real-time status of emissions monitors as they run, complete, or require further action during your drive. -Immediate Diagnostics: Quickly identify and address active trouble codes (DTCs) as they appear, eliminating uncertainty during drive cycles. -Efficiency and Accuracy: Avoid unnecessary repeat drive cycles by verifying real-time monitor completion, ensuring vehicles pass inspection on the first try. -Precise Drive Cycle Guidance: Monitor essential drive cycle parameters such as speed, RPM, engine temperature, and throttle position to meet exact diagnostic requirements. -Professional Dashboard: Access all critical information quickly through a clear, easy-to-navigate interface tailored for automotive professionals. -Instant Code Explanations: Quickly interpret trouble codes with straightforward, mechanic-friendly explanations. Why Mechanics Trust Diagonal: -Saves Valuable Time: Complete diagnostic drive cycles accurately the first time. -Faster Inspections: Immediately identify vehicle readiness to streamline your workflow. -Reduces Diagnostic Uncertainty: Clear, actionable data presented in real-time. -Diagonal empowers professional technicians with the tools to perform diagnostics faster and more efficiently than ever before. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://diagonal-d070c.web.app/privacy.html

About

Add Text to PDF

Effortlessly add text, notes, and signatures to PDF documents and images. Fill out forms, annotate scanned papers, and label photos with a clean, intuitive interface. All your work is automatically saved for easy access and sharing.

Highlights
  • Add text directly on PDF documents
  • Fill out forms and annotate files
  • Add text and captions to imported photos
  • Insert digital signatures
  • Automatic file saving and organization
  • Offline, secure, and privacy-friendly
Features
Read full description

Add Text to PDF – Fill Forms makes working with documents effortless. Whether you want to fill out forms, type notes on scanned papers, or mark up PDFs for work or study, this tool lets you do it all with clarity and precision. Whenever you need to add text to an existing PDF, simply open your file, tap where you want to write, and start typing. It feels natural and fast, with results that look professional. You can even import photos from your gallery and place text or captions directly on top of them, making it useful for labeling receipts, adding titles to images, or filling out forms from scanned documents. Key Features • Add text and write directly on PDF documents • Fill out forms or annotate existing files instantly • Import photos from your gallery and add text or captions • Insert your digital signature anywhere in the document • All your files are automatically saved for quick access • Clean, intuitive design focused on fast editing Why Add Text to PDF – Fill Forms 1. Designed for quick and accurate text editing on PDFs 2. Works seamlessly with both documents and imported images 3. Keeps every file automatically organized and saved 4. Simple, modern interface without distractions 5. Fully offline, secure, and privacy-friendly Adding your signature is simple too. Just draw or import it once and place it wherever needed. Every document you edit or create is automatically saved, so you never lose your work. Your files are organized in one place for easy viewing and sharing whenever you need them. With Add Text to PDF – Fill Forms, editing becomes effortless. Write on PDFs, fill forms, and add notes wherever you need them. Everything you create stays saved automatically, ready to view or share anytime. It’s the simplest way to add text to documents and keep your workflow smooth and organized. Privacy Policy: https://www.onerack.nl/apps/pdf-text/privacy-policy Terms of Service: https://www.onerack.nl/apps/pdf-text/terms-and-conditions

Screenshots

DiagonalOBDII4 screens
Add Text to PDF4 screens

Verdict

The call

The clearest difference is update cadence: DiagonalOBDII at every 2 weeks against Add Text to PDF's every 5 months. Add Text to PDF's advantage is monetization model (free vs freemium) and ratings volume (4 vs 1). On price, rating, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. DiagonalOBDII sells 4 in-app purchases, starting at $12.99 per month and Add Text to PDF sells 2 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for DiagonalOBDII against 5.0 for Add Text to PDF. Both are backed by a comparable volume of ratings — 1 and 4 respectively.

UpkeepUpdate frequency

DiagonalOBDII ships an update every 2 weeks, Add Text to PDF every 5 months. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 6 level
DiagonalOBDII versus Add Text to PDF: the parameters behind the verdict, then further details
ParameterDiagonalOBDIIAdd Text to PDF
PriceFreeFree
Rating5.0 (1 ratings)5.0 (4 ratings)
Positive reviews0.0% of reviews—
Number of ratings14 — better
Update frequencyEvery 2 weeks — betterEvery 5 months
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree — better
DevicesiPhoneiPhone, iPad — better
Requires iOS18.116.4 — better
Further details — not scored
Size24 MB72 MB
Age rating4+4+
DeveloperKyle LouderbackOneRack

Customer experience

DiagonalOBDII

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Add Text to PDF

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

4 purchases

DiagonalOBDII

Subscriptions4
  • Diagonal Premium Monthly$12.991 Month
  • Diagonal Premium Trial1 Month trial$12.991 Month
  • Shop Owner - Monthly$17.991 Month
Show 1 more
  • Diagonal Premium Yearly$99.991 Year
2 purchases

Add Text to PDF

Subscriptions2
  • Pro Weekly Access3 Days trial$6.997 Days
  • Pro Yearly Access$29.991 Year

Questions

Is DiagonalOBDII free?
DiagonalOBDII is free to download, with in-app purchases available.
Is Add Text to PDF free?
Add Text to PDF is free to download, with in-app purchases available.
Which has better reviews, DiagonalOBDII or Add Text to PDF?
DiagonalOBDII and Add Text to PDF are both rated 5.0 out of 5 on the App Store, from 1 and 4 ratings respectively.
Do DiagonalOBDII or Add Text to PDF have ads?
Neither DiagonalOBDII nor Add Text to PDF shows ads.
Which is updated more often, DiagonalOBDII or Add Text to PDF?
DiagonalOBDII ships an update every 2 weeks, and Add Text to PDF every 5 months. Most recently, DiagonalOBDII was updated on November 4, 2026 and Add Text to PDF on October 30, 2026.

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