QReduce Lite provides more accurate KB & MB compression : https://play.google.com/store/apps/details?id=com.mobso.photoreducer.lite
Operates in two modes: Single & Batch
Compress, Resize photo to any quality and size.
Reduce photo size in KB & MB (Kilobyte & Megabyte).
Resize, Compress multiple photos at a time.
Reduce multiple photos in KB & MB.
Create and share Zip file of reduced photos.
* Photo aspect ratio, file name is maintained.
* Input Formats: JPEG, PNG, BMP. (All photos taken using camera are JPEG. So no worries.)
* Output Format: JPEG, PNG. (See App Settings)
** If application crashes or get stuck while resizing, then deselect this option in settings - "Handle large images without sampling" **
Note: The app developer is not affiliated or associated to Instagram , Facebook , Google+, WhatsApp, Twitter, Pinterest or any other social medias.
(*Photo size is reduced by reducing photo quality*)