Independent iOS app studio
Focused apps,
crafted for iPhone.
Appexion designs, builds and publishes its own iOS apps — from AI-powered video captions to dual messaging. Simple to use, beautifully made and improved with every update.
Our apps
Made for creators
and communicators.
Each Appexion app solves one problem end to end — and keeps getting better with every release.
Photo & Video
AI Captions: Video Subtitle
Auto subtitles & styles, in seconds.
Turn speech into accurate, animated captions automatically. Style every word, translate into 55+ languages and export videos ready for TikTok, Reels and Shorts.
- Automatic speech-to-subtitle transcription
- Animated caption templates, fonts and colours
- Built-in teleprompter for recording
- Export as video, SRT or VTT
Social Networking
Dual Messenger for Web App Duo
A second number for dual chat.
Use a second messaging account on the same iPhone, or mirror one account on your iPad, through a clean desktop-style web view.
- Two accounts on one iPhone
- One account across iPhone and iPad
- Screen Lock with Face ID, Touch ID or passcode
- One-tap session logout
The studio
Small team.
High standards.
Appexion Ltd is an independent mobile app studio based in London. We design, build and publish our own apps — and hold every release to the same bar.
Focused by design
Every app does one job and does it brilliantly. No clutter, no learning curve.
Native to iPhone
Designed for iOS from the first pixel, so everything feels fast, familiar and at home on your device.
Always improving
Regular updates shaped by App Store reviews and user feedback. Your suggestions become features.
Fair & transparent
Free to download, clear Premium plans, and subscriptions you can manage anytime from your Apple account.
What is Appexion?
Appexion Ltd is an independent mobile app studio registered in London, United Kingdom. It designs, builds and publishes its own iOS apps on the Apple App Store, including AI Captions: Video Subtitle and Dual Messenger for Web App Duo.
What does the AI Captions app do?
AI Captions automatically turns the speech in your videos into accurate, editable subtitles. You can style captions with animated templates, translate them into 55+ languages, record with a built-in teleprompter and export ready-to-post videos or SRT/VTT subtitle files. It runs on iPhone and iPad with iOS 16 or later.
What is Dual Messenger?
Dual Messenger for Web App Duo lets you use a second messaging account on the same iPhone, or one account across iPhone and iPad, through a desktop-style web view. Chats can be protected with Face ID, Touch ID or a passcode. It requires iOS 17 or later and is an independent app, not affiliated with Meta or WhatsApp.
Are Appexion apps free?
Yes, both apps are free to download. Optional Premium subscriptions unlock advanced features. Prices are shown in the App Store before you subscribe and may vary by country.
How do I cancel a subscription?
Subscriptions are managed by Apple. On your iPhone, open Settings › your name › Subscriptions, select the app and tap Cancel Subscription. Deleting the app does not cancel an active subscription.
How can I contact Appexion support?
Use the contact form on this page. Mention the app name, your device and iOS version so we can help you faster.
How does Appexion handle my data?
Our Privacy Policy explains what data our apps process, why, and how to exercise your rights. Dual Messenger has its own privacy notice.
Contact
Let’s talk.
Support request, feedback or partnership idea — send us a message and we’ll get back to you by email.
- SupportTell us which app, device and iOS version you use.
- SubscriptionsManaged in Settings › your name › Subscriptions.
- CompanyAppexion Ltd · 71-75 Shelton Street, Covent Garden, London WC2H 9JQ, United Kingdom
By sending this form you agree to our Privacy Policy.