What is Fill used for?

Fill is an iPhone social app where you pose and answer questions anonymously or in private, with shareable question links, posts, a close-friends list and profiles. It is a good fit for collecting anonymous questions from friends, and building a following with posts and comments.

No. Fill is proprietary (closed-source) software. In the Social Media category, open-source options include Mastodon, Postiz and Bluesky.

What are some alternatives to Fill?

Other SaaS products in the Social Media category include Travel Datings, Whispa and FoundPeers.

Fill: features, pricing and alternatives

About Fill

Fill is an iPhone app in French and English built around questions. You can ask and answer questions anonymously or not, and choose to answer privately so that only you and the asker continue the discussion. A question link can be shared across other networks so that anyone can send you questions without installing the app.

The app also supports posts with mentions and subjects, where posts on the same subject are grouped, and activity on a post can push it up the main feed called the Jungle. You can add up to 5 close friends who see your private questions, and profiles hold a bio, favorite music, three photos and links to Instagram, TikTok and other networks.

It is free to download with in-app purchases, including a Fill+ subscription with extras such as post boosts and weekly streaks and an option to gift Fill+. It is listed in Social Networking with a 16+ age rating, and recent updates made answers to private questions visible only to the people involved and close friends.

Key features

Anonymous or private questions and answers
Shareable question link for non-users
Posts grouped by subject
Main news feed called the Jungle
Up to 5 close friends listed
Profile with bio, music and social links

Good fit for

Collecting anonymous questions from friends
Building a following with posts and comments

Tags: anonymous-questions; social; ios; friends; qna; french; community

Fill: questions and answers

What is Fill used for?: Fill is an iPhone social app where you pose and answer questions anonymously or in private, with shareable question links, posts, a close-friends list and profiles. It is a good fit for collecting anonymous questions from friends, and building a following with posts and comments.
Is Fill free?: Yes. Fill has a free plan.
Is Fill open source?: No. Fill is proprietary (closed-source) software. In the Social Media category, open-source options include Mastodon, Postiz and Bluesky.
What are some alternatives to Fill?: Other SaaS products in the Social Media category include Travel Datings, Whispa and FoundPeers.