Comparison

PCalc vs Auto Audio

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

Head to head
About

PCalc

A powerful calculator designed for professionals and students, offering advanced features like RPN mode, multi-line display, and extensive unit conversions. It supports various number systems and includes an Apple Watch app for on-the-go calculations.

Highlights
  • Optional RPN mode
  • Multi-line display
  • Extensive unit conversions
  • Paper tape
  • Multiple undo/redo
  • Hexadecimal, octal, binary support
  • Apple Watch app
Features
Currently charting
Read full description

PCalc is the powerful choice for scientists, engineers, students, programmers, or indeed anybody looking for a feature rich calculator. It includes an optional RPN mode and multi-line display, a choice of button layouts, an extensive set of unit conversions and constants, a paper tape, multiple undo and redo, engineering and scientific notation, as well as support for hexadecimal, octal, and binary calculations. Includes an Apple Watch app, so you can calculate on your wrist!

About

Auto Audio

Features
Read full description

The app will provide 8 solutions for recording the sound. 1 Record from Apple Watch. In Watch OS 5, could record the sound when the watch screen is off. When this App records the sound in the background in Apple Watch, sometime, a red icon of microphone will be displayed at the top middle of Watch Screen. That means, this App is recording the sound in the background status. Just tap this red icon, this App will be displayed again. After finishing the recording, the record file will be transferred to the iPhone automatically. In iPhone, when we tap the file folder icon on the top left corner in the main tab controller, the file from watch will be displayed. In Watch App, tap the table cell, the detail of the record sound will be displayed. We will see a transfer button. If we need to transfer the record file to iPhone again, please tap this button. 2.Auto: When this App is inactive, just tap this App icon, this App could record the sound automatically.When you need to record the sound as soon as possible, you may like this solution. If you need to get this solution, just make the fast tab page appear before you press the home key. 3 Intelligent: this App could start recording the sound when the pitch level of sound is over the indicted level of starting record. It could stop recording when the pitch level of sound is below the indicted level of stopping record. If you need to record the sound when it is higher than some pitch level, just make the intelligent tab page appear. 4 Gesture: gesture double tap or pinch could create the different size sound files. The larger size is more qualified. The smaller size could save the disk space and the sound is also qualified. If you need to use this solution, just make the gesture tab page appear. 5 Proximity: Cover the top part of the iPhone screen , this App will record the sound. Cover the iPhone screen again, this App will stop recording. In some situation, you do not want to tap the device screen, then this solution is yours. For example, you could use one book to cover the top part of the iPhone screen, or use your hands, your clothes,and even use your face.If you need to use this solution, just make the proximity tab page appear. 6 Delay the action : delay the recording after 0 - 30 seconds. In some situations, you want to record the sound after a little time, then this solution may help you.If you need to use this solution, just make the timer tab page appear. 7 Standard recording the sound, if you just want to record the sound by tapping the button directly, this App is yours. Just make the timer tab page appear, ensure the delay is zero second, and tap the button of Record One Audio Clip. 8 Repeat recording. Some times, you may need to record the sound files after the indicted duration. In the timer tab page, tap the button - record the audio by interval. In iPhone or iPad, this App could also continue recording the sound in the background. You could set your preferences. So tap the button at the upper right corner of the main view, you could set your own preferences from the setting view. These preferences includes the max duration of the sound file, the sound pitch level for start record and stopping record. You could also indict whether enable the background record when this App is inactive. After the file is created, you could send the sound file by email account in your device.By using the iTune File Sharing features, you could export the record sound to the iTune computer such as Mac PC. Tap the To iCloud button, the new view will display the item : iCloud Drive, tap this item to export the file to iCloud. In the main view, just tap the upper left button, you could view the file folder, the sound file size and sound duration will be displayed. The user could rename the sound file. You could play the sound file according to your needs.

Screenshots

PCalc4 screens
Auto Audio4 screens

Verdict

The call

The clearest difference is price: Auto Audio at $0.99 against PCalc's $9.99. Auto Audio also leads on in-app purchases (none vs 4) and iOS requirement (12.0 vs 15.0). PCalc's advantage is chart position (#69 vs unranked). On update cadence, ads 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

PCalc costs $9.99 and Auto Audio $0.99 up front. PCalc sells 4 one-off in-app purchases. Auto Audio asks for nothing beyond the download.

UpkeepUpdate frequency

PCalc ships an update every 6 weeks, Auto Audio every 4 weeks. The most recent releases landed on September 24, 2026 and September 9, 2026 respectively.

Scorecard4 real differences · 7 level
PCalc versus Auto Audio: the parameters behind the verdict, then further details
ParameterPCalcAuto Audio
Price$9.99$0.99 — better
Rating4.7 (770 ratings) — better—
Positive reviews83.6% of reviews—
Number of ratings770 — better—
Update frequencyEvery 6 weeksEvery 4 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
Best chart rank#69 — better—
DevicesiPhone, iPad, iPod, Apple Watch, Vision Pro — betteriPhone, iPad, iPod, Apple Watch
Requires iOS15.012.0 — better
Further details — not scored
Size81 MB4 MB
Age rating4+4+
DeveloperTLA Systems Ltd.方 沈

In-app purchases

4 purchases

PCalc

One-time4
  • Small Tip$0.99
  • Medium Tip$1.99
  • Large Tip$4.99
Show 1 more
  • Enormous Tip$9.99
None

Auto Audio

No in-app purchases

Questions

Is PCalc free?
PCalc costs $9.99, and also offers in-app purchases.
Is Auto Audio free?
Auto Audio costs $0.99, with no in-app purchases.
Do PCalc or Auto Audio have ads?
Neither PCalc nor Auto Audio shows ads.
Which is updated more often, PCalc or Auto Audio?
PCalc ships an update every 6 weeks, and Auto Audio every 4 weeks. Most recently, PCalc was updated on September 24, 2026 and Auto Audio on September 9, 2026.

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