Not only you can recover deleted audio on mobile phone, you can recover on Mac or Windows by taking your mobile phone as an external hard drive to your computer, this would be much easier to process the recovery on a computer and it will be faster.

Windows users can use Stellar Data Recovery, while mac users can use Cisdem Data Recovery to recover the data, not limited to audios, you can even find back your videos, photos, documents, archives, etc. Of course, both of them supports restoring lost files on a local disk/drive.

For more solutions to recover deleted audios, you can check this source: https://www.cisdem.com/resource/recover-deleted-music-files.html

There are several online free PDF editors, you can check following:

#1 PDFescape: helps to create fillable pdf forms or protect pdf files with this free service.

#2 PDF Filler: users are allowed to view, highlight, sign, add images, search PDF for free.

#3 PDF Buddy: allows to add text, to annotate, to insert images and signatures, even split and merge PDF files.

Also, you can find another 3 free PDF editor for your Mac: https://www.cisdem.com/resource/best-free-pdf-editor-mac.html

Yes, I agree, Recuva is worth a try. It is a free Windows program to recover files both on internal or external storage device.
Here are the steps to recover deleted files with Recuva.
1. Download, install and run Recuva on your Windows PC.
2. Choose the file type or location to recover deleted files.
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3. Click “Start” to start the scanning.
4. Select files for recovery and click “Recover” to get deleted files back to computer.
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Also, you can find a Recuva Review here, if you want to know more about this free data recovery: https://www.cisdem.com/resource/recuva-review.html

For mac users, the best free data recovery software is PhotoRec, it helps recover deleted videos, images, document from both internal and external hard drive on Mac, however, it is command-line-based program, it does helps to recover deleted files on Mac, but it is not user-friendly to use.

There are 3 options.

#1 online2pdf (https://online2pdf.com/)
It is free and easy to use, you just need to upload your scanned PDF or images files and choose file language/output, a editable file will be created for you. The quality is good but not stable. Anyway, comparing with other online OCR tools, this one really does a better OCR job.

#2 cisdem pdf converter ocr (https://www.cisdem.com/pdf-converter-ocr-mac.html)
If you are looking for an affordable but good-performance OCR tool, Cisdem is a good choice, it is designed to convert all types of PDFs (native, scanned, protected) and images into 16 formats, with original formatting. It also builds in a PDF creator to allow users to create PDF from other files. But it cannot edit PDF files and there is only mac version.

#3 Abbyy FineReader (https://www.abbyy.com/en-us/)
If you have searched in google to find an outstanding OCR program, you shouldn't miss AbbyyFineReader, it brings high-quality OCR results, also offers extended features to manage PDF files. Even, you can directly turn papers into searchable and editable Word format. However, the price is high.

You can use online JPG to Word converters:

#1 Zamzar
If you work on file conversion very often, you should be familiar with this online free OCR tool, converting JPG to Word is one of its various free services. If you want to convert video, audio, eBook, image or CAD, Zamzar will offer you a free solution.

#2 Online-Convert
It supports to convert any document into Docx. You can upload JPG file in 3 ways: directly import from computer, enter url, upload from cloud services.

#3 onlineocr
It supports performing OCR on PDF and image files, export them into Docx, Text and XLSL.

Also, you can find more choices to convert JPG to Word offline(https://www.cisdem.com/resource/how-to-convert-jpg-to-word.html)

Also, if you have a computer at hand, you can try a SD Card data recovery software to recover files from mobile device, such as:
1. Recuva (Free and $19.95, Windows)
2. Wise Data Recovery (Free, Windows)
3. Cisdem Data Recovery (Free and paid, MacOS)
4. Card Recovery (Mac and Windows, Free and $39.95)

To recover photos from Samsung, there are 2 ways, one is with computer, the other one is without computer:
Method 1: With Computer
For Mac users, try Cisdem Data Recovery, it can recover various files from internal or external storage device, on mac or on mobile phone, even other storage devices
For Windows users, try EaseUS MobiSaver for Android, it helps to recover deleted photos, contacts or other data from Samsung and other Android devices.

Method 2: Without Computer (Using Samsung Cloud):
1.Tab on Samsung Settings
2.Go to Cloud and accounts
3.Tab on Samsung Cloud and click “Start”
4.Choose “Restore” and select “Photos” under the backed up data.
5.Tab on “RESTORE NOW”.

For more details or solutions, you can check in the source article: https://www.cisdem.com/resource/recover-deleted-photos-from-samsung.html

There are lots of free videos online working as perfect resources to learn, work and do workout. And here is a good way to download these online videos for personal use, using the tool Cisdem Video Converter (https://www.cisdem.com/video-converter-mac.html).

It helps me to download videos from YouTube, Vimeo, Bing, DailyMotion and basically all mainstream websites to get video sources. Also, we can use this tool to convert videos to other formats, so we can play on our device anytime anywhere.

That means your Pages document wasn't given a name, right. Try following to recover your pages document:
1. Go to Finder>File>Find
2. Choose “This Mac” and select file kind as “Document”.
3. Right click on the blank area of the toolbar marked in red box, choose “Date Modified” and “Kind” to arrange files. Find your files.
4. Open the found Pages document and save it.

Also, you can find other ways to recover an unsaved or deleted pages document here:
https://www.cisdem.com/resource/how-to-recover-pages-document.html

Here is a list of websites to download free 4K movies:
1. Netflix
2. Amazon Prime
3. UltraFlix
4. Sony Ultra
5. YouTube
6. Vudu
7. Vimeo
8. Fandangonow
9. Metacafe
10. 4k-hd.club
11. Blu-ray.com
12. Mydownloadtube
You can find the difference between these websites here: https://www.cisdem.com/resource/4k-movies-download.html

Best free PDF to PowerPoint Converter:
#1 Zamzar PDF to PPT Converter
#2 Nitro PDF to PPT Converter
#3 online2pdf PDF to PPT Converter
#4 Smallpdf PDF to PPT Converter