Comparison

Old PDF Reader vs ng

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

Head to head
About

Old PDF Reader

Easily browse and view your PDF documents. Adjust the display style in six stages for comfortable reading. Import PDFs directly from your device's share function.

Highlights
  • PDF document browsing
  • Adjustable display style
  • Import from share button
  • Document list management
  • Simple interface
Features
Read full description

This application is a PDF reader. You can segment the button below to browse through old documents as a PDF. Style can be adjusted in six stages. Please import a PDF document from the share button at the bottom right of iTunes in the first. PDF document read once will be displayed in the top of this screen. To remove the PDF document captured, you can flick on a table cell.

About

ng

Features
Read full description

ng-audio is a professional control and measurement app developed for ng-audio subwoofers equipped with built-in RAM Audio PowerPack amplifiers. The app is also compatible with other subwoofers and loudspeaker systems using RAM Audio PowerPack DSP, making it suitable for both ng-audio installations and third-party systems. ng-audio provides direct DSP control together with advanced acoustic measurement tools, allowing precise low-frequency tuning and system verification directly from your iPhone or iPad. Wifi control of RAM Audio PowerPack DSP amplifiers Optimized workflow for ng-audio active subwoofers Compatible with third-party PowerPack-based systems (Limited Support) Real-time gain, mute, polarity, and preset control Live input/output VU metering Parametric EQ editing with direct DSP synchronization Logarithmic sweep measurements and frequency response analysis Real-Time Analyzer (RTA) SPL meter with manual and signal-based calibration USB microphone support with native UMIK-1 compatibility . Designed for system technicians, integrators, and audio professionals who require fast accurate control and reliable measurements in the field.

Screenshots

Old PDF Reader4 screens
ng4 screens

Verdict

The call

The clearest difference is update cadence: ng at every 10 days against Old PDF Reader's every 24 months. Old PDF Reader's advantage is iOS requirement (7.1 vs 26.0). 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Old PDF Reader ships an update every 24 months, ng every 10 days. The most recent releases landed on September 15, 2026 and September 13, 2026 respectively.

Scorecard2 real differences · 8 level
Old PDF Reader versus ng: the parameters behind the verdict, then further details
ParameterOld PDF Readerng
PriceFreeFree
Rating4.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 24 monthsEvery 10 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS7.1 — better26.0
Further details — not scored
Size48 MB27 MB
Age rating4+4+
DeveloperSTUDIO SHINDaniel Nordgren

In-app purchases

None

Old PDF Reader

No in-app purchases

None

ng

No in-app purchases

Questions

Is Old PDF Reader free?
Old PDF Reader is free to download, with no in-app purchases.
Is ng free?
ng is free to download, with no in-app purchases.
Do Old PDF Reader or ng have ads?
Neither Old PDF Reader nor ng shows ads.
Which is updated more often, Old PDF Reader or ng?
Old PDF Reader ships an update every 24 months, and ng every 10 days. Most recently, Old PDF Reader was updated on September 15, 2026 and ng on September 13, 2026.

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