Old PDF Reader vs ng
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- PDF document browsing
- Adjustable display style
- Import from share button
- Document list management
- Simple interface
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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.
ng
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
| Parameter | Old PDF Reader | ng |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 24 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 7.1 — better | 26.0 |
| Further details — not scored | ||
| Size | 48 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | STUDIO SHIN | Daniel Nordgren |
In-app purchases
Old PDF Reader
No in-app purchases
ng
No in-app purchases









