"I have used my IPhone 6S for a few months. But recently I found my phone reacts slower and slower. I suppose the reason must be that the cache is nealy full. So I think there is a necessary to clear the cache of all the apps on my IPhone 6S. Unfortunatly, I forgot that there are some important messages in the WhatsApp and I clean them along way with all the others. Is it possible to recover the deleted WhatsApp messages?"
I am so pleased that I can perfectly solve your trouble. I think what you need is the program which is named iPhone Files Recovery.
iPhone Files Recovery is a simple and comprehensive data recovery program, which offer services including recover data from iOS devices directly, recover data from iTunes backup files, recover data from iCloud backup files. Besides, it's able to repair iOS operating system issues: iPhone stuck in Recovery Mode, stuck on Apple logo, and iOS devices perform abnormally. As you can see, it is really powerful. with the help of iPhone Files Recovery, you can recover the deleted data with ease. What's more, it's perfectly compatible with iPhone 7, iPhone 6S/6S Plus, iPhone SE, iOS 9.3 and later.
To recover deleted WhatsApp messages from iPhone 6S/6S Plus, you should follow the 3 simple steps:
After you download, install and launch the program, a window will pop up. You are required to connect your iPhone 6S/6S Plus to the computer using a USB. iPhone Files Recovery will detect your iOS device automatically and shows you the window for "Recover from iOS Device".
After selecting the file types you want, you just need to click the "Start Scan" to start the scanning process. It will take a few minutes to scan all the files in your phone. If there are enormous files on your phone, you will have to wait for a little bit longer time.
After the scanning is finished, all data on your phone will be extracted and displayed in categories. You can preview them one by one before recovery. Then you can selectively check those you want. Finally, click "Recover" button at the bottom. You are allowed to choose the destination, it can be your phone or your PC, which depends on yourself.
Note: Please keep your iPhone is well-connected during the whole recovery process.
In addition to directly restore deleted WhatsApp messages & attachment from your iPhone 6S or 6S Plus, the program also allows you to scan and extract your deleted or lost WhatsApp messages & attachment and more data from iTunes or iCloud backups with ease.