# How Did My Contacts App Jump from 800MB to Almost 12GB? Reasons behind the sudden increase in app size and solutions. - **Source:** [r/iPhone](https://brifing.si/source/65bd5ccb-b1f4-4747-91e7-cf5959dd2097) - **Published:** 2026-07-23 - **Topic:** [Software & Engineering](https://brifing.si/c/engineering) - **Original article:** - **On Brifing:** https://brifing.si/s/430efa5f-1bff-46ea-abef-b9d7e30b8aa6 ## The Beginning of the Problem Many users noticed that the Contacts app size increased from 800MB to almost 12GB. This situation significantly affected device storage and caused concern among users. ## Data Accumulation The main reason for the increase in app size is the accumulation of data over time. Particularly, backups and synchronization processes can increase the app's size. ## Update Impact Recent updates may cause the app to store more data. These updates bring performance improvements but can have a negative impact on storage space. ## Solution Paths Users should first clean up unnecessary data to reduce the app size. Additionally, checking backup and synchronization options in the app settings can be beneficial. ## App Cleaning To clean app data, going to device settings and resetting the storage of the Contacts app can be an effective solution. This process significantly reduces the app size. ## Importance and Conclusion The increase in app size can affect device performance and negatively impact user experience. Therefore, regular cleaning and update tracking are important. ## Sources covering this story - https://www.reddit.com/r/iphone/comments/1v4491a/howwhy_the_heck_did_my_contacts_app_jump_from/ — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._