Basics


Info Download

Advanced

v/v
V
V

Plot Download

Native to the system, this is excellent for reading locally stored PDFs and EPUB files.

Not everything works here. Facebook and Instagram are dead on iOS 9. However, these three stalwarts still function surprisingly well.

requires at least iOS 13 and cannot be run on iOS 9.3.5 regardless of installation tricks. Additionally, while some apps install, they may experience lag or limited functionality as developers stop updating the legacy servers they rely on.

Despite the workarounds, the list of truly functional apps is shrinking due to the "Server-Side Sunset" effect. Many apps, particularly those relying on internet connectivity, have severed ties with older versions. Facebook, Messenger, and Netflix, for instance, often force updates or disable login capabilities for older app versions. However, "offline-first" applications remain highly functional. Productivity suites like Pages, Numbers, and Keynote (the iWork suite) work perfectly on iOS 9.3.5. Similarly, note-taking apps like Evernote or legacy versions of Microsoft Office are often usable for basic tasks, making these older iPads excellent digital typewriters or recipe books.

Before exploring the list, you must know how to bypass the App Store's version blocks. If you try to download a modern app directly onto an iOS 9.3.5 device for the first time, it will usually fail.

Disclaimer: This tool is provided for educational and illustrative purposes only. No guarantee is made regarding accuracy, suitability, or performance. Use at your own risk. - Copyright: ufelectronics.eu / Andreas Dyhrberg

×
Amplifier Schematic
×

There are different ways to calculate an amplifier, depending on what you want to achieve.

Maybe you want to achieve a certain gain, as far as possible (classic mode). Or you have a low Vcc to respect (modern mode). Or you work with analog audio amps (symmetry mode).

Depending on what you want to achieve and the way of calculating it. Some fields might become dependent on others, or the other way around.

Your above choise makes some input fields available for manipulation, while hiding others.

🎯 1. Target Gain (Av) — "Classic mode" ios 9.3.5 compatible apps list

You care about how much your amplifier multiplies the input signal.

Set desired voltage gain and Rc voltage drop. Best for learning and simple amplifiers.

You say: “I want a gain of 10.”
The app adjusts resistors to try and match that.
You must give Av and Vrc (the voltage dropped across Rc).

Best for common emitter amplifiers.

✅ Default choice for most beginners and educational use. Native to the system, this is excellent for

⚡ 2. Target Emitter Voltage (Ve) — "Modern mode"

You care about setting a healthy DC bias point.

Prioritize stable biasing via Ve. Useful for low-voltage circuits or precision designs.

You say: “I want Ve = 0.5 V, to keep the transistor out of trouble.”
This makes sure your transistor stays in active mode.
Gain becomes whatever it turns out to be.

Ideal for common emitter amplifiers when the goal is to ensure proper biasing for low-voltage or precision circuits, and it’s also used in class AB amplifiers to prevent distortion Despite the workarounds, the list of truly functional

✅ Useful in low-voltage designs (e.g., 3.3V systems).

🧭 3. Target Collector Voltage (Vc) — "Symmetry mode"

You want to place the collector in the middle of the power rail.

Target Vc = Vcc/2 for maximum signal swing. Great for audio and analog signals.

You say: “Make Vc = Vcc/2” for maximum swing.
Useful for analog audio amps or symmetrical headroom.
Gain and Ve are outcomes.

Best for common collector amplifiers and class AB amplifiers.

✅ Best for signal integrity.

Ios 9.3.5 Compatible Apps List Jun 2026

Native to the system, this is excellent for reading locally stored PDFs and EPUB files.

Not everything works here. Facebook and Instagram are dead on iOS 9. However, these three stalwarts still function surprisingly well.

requires at least iOS 13 and cannot be run on iOS 9.3.5 regardless of installation tricks. Additionally, while some apps install, they may experience lag or limited functionality as developers stop updating the legacy servers they rely on.

Despite the workarounds, the list of truly functional apps is shrinking due to the "Server-Side Sunset" effect. Many apps, particularly those relying on internet connectivity, have severed ties with older versions. Facebook, Messenger, and Netflix, for instance, often force updates or disable login capabilities for older app versions. However, "offline-first" applications remain highly functional. Productivity suites like Pages, Numbers, and Keynote (the iWork suite) work perfectly on iOS 9.3.5. Similarly, note-taking apps like Evernote or legacy versions of Microsoft Office are often usable for basic tasks, making these older iPads excellent digital typewriters or recipe books.

Before exploring the list, you must know how to bypass the App Store's version blocks. If you try to download a modern app directly onto an iOS 9.3.5 device for the first time, it will usually fail.