Comparison

DuoFace vs Acid

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

DuoFace

This secure messaging app prioritizes your privacy with end-to-end encryption and anonymous communication. It offers a clean, ad-free experience, allowing you to chat without revealing personal contact information.

Highlights
  • End-to-end message encryption
  • Anonymous communication via Duo Numbers
  • No ads or trackers
  • Private contact information
  • Secure data safeguarding
Features
Read full description

DuoFace is your go-to secure and private messaging app. Designed with privacy at its core, DuoFace cares about the security of your data, ensuring it remains inaccessible to anyone else. - SECURE MESSAGE PRIVACY DuoFace is designed to prioritize your privacy. Your messages are encrypted end-to-end, guaranteeing that only you and your intended recipient can access them. DuoFace ensures that every message is safeguarded from illegal decryption or unauthorized access. DuoFace's advanced security measures always maintain the confidentiality and integrity of your communications at all times. - GUARANTEE USER ANONYMITY DuoFace is dedicated to providing complete anonymity to its users. Each user is given a unique Duo Number, which allows you to chat with others without revealing your phone number or email address. While you can access your account using your phone number or email, this information remains private and cannot be accessed by anyone else in any way. - NO ADS, NO TRACKERS DuoFace is completely ad-free, providing a smooth and clean user experience. You can enjoy uninterrupted and focused communication without the distraction of advertisements. Additionally, DuoFace does not track user activity within the app or share user data with third parties. Customer Service: support@duomessenger.app --- Terms: https://duomessenger.app/terms.html

About

Acid

Connect with communities that matter to you, from niche fandoms to close friends. Create or join groups with dedicated posts, real-time chat, and private messaging. Enjoy a focused, ad-free social experience built for genuine conversations.

Highlights
  • Create or join communities
  • Posts, comments, and reactions
  • Real-time chat rooms
  • Private direct messages
  • Customizable user profiles
  • Notification system
Features
Read full description

Acid is for the communities you actually care about — not the ones an algorithm serves you. Whether it's niche fandoms, indie devs, hobbyists, or a handful of friends who share an interest no one else gets, Acid lets you build, find, and chat in communities that feel like home. WHAT'S INSIDE: - Communities — Create or join groups around any topic. Each community has its own posts, chat rooms, members, and culture. - Posts and comments — Share text, images, and links. Comment, react, and thread conversations like an actual forum. - Chat rooms — Real-time chat inside every community. No need for a separate app. - DMs — Private messages with anyone. Block and report tools built in. - Profiles — Show your other communities, badges, and a personal wall. - Notifications — Stay caught up with replies, mentions, and reactions. BUILT FOR REAL CONVERSATIONS: - No feed algorithm pushing engagement at any cost - No ads or sponsored content - Strong moderation and reporting tools across every surface - Block, report, and mute — at every level - 13+ only Acid is built by one developer who got tired of mainstream social apps. Everything is real, everything is human, everything is community. Have feedback or need help? Tap "Send Feedback" in your profile or join our Discord — we read every message.

Screenshots

DuoFace3 screens
Acid1 screens

Verdict

The call

The clearest difference is rating: Acid at 3.0 against DuoFace's 2.3. On price, review sentiment, ratings volume and update cadence there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Acid holds the better App Store score, 3.0 against 2.3. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

DuoFace ships an update every 9 days, Acid every 5 days. The most recent releases landed on October 25, 2026 and October 22, 2026 respectively.

Scorecard1 real difference · 9 level
DuoFace versus Acid: the parameters behind the verdict, then further details
ParameterDuoFaceAcid
PriceFreeFree
Rating2.3 (3 ratings)3.0 (2 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings3 — better2
Update frequencyEvery 9 daysEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size41 MB52 MB
Age rating4+17+
DeveloperJUSI PTE.LTD.Fernando Rui

Customer experience

DuoFace

All ratings3 ratings
Positive33.3%
Neutral0.0%
Negative66.7%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Acid

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

DuoFace

No in-app purchases

None

Acid

No in-app purchases

Questions

Is DuoFace free?
DuoFace is free to download, with no in-app purchases.
Is Acid free?
Acid is free to download, with no in-app purchases.
Which has better reviews, DuoFace or Acid?
Acid is rated higher. DuoFace averages 2.3 out of 5 from 3 ratings, while Acid averages 3.0 from 2 ratings.
Do DuoFace or Acid have ads?
Neither DuoFace nor Acid shows ads.
Which is updated more often, DuoFace or Acid?
DuoFace ships an update every 9 days, and Acid every 5 days. Most recently, DuoFace was updated on October 25, 2026 and Acid on October 22, 2026.

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