Mobile appAI productsOriginal by Luka
Replika offers users a personal AI companion that is always available. Users customise an avatar and chat daily; over time the companion learns their interests, moods and important memories. That personalisation and continuity turn the app from a chat tool into a relationship experience. Daily goals, mood tracking and voice calls strengthen engagement.
To build something similar you need a chat engine with personalised memory, a customisable 3D or 2D avatar, voice and video calls, a relationship and progression system and a subscription infrastructure. The most sensitive layer of this product is safety: age verification, content moderation, safeguards against emotional dependence, redirection to professional help in a crisis and strict compliance with App Store and Google Play rules must be designed from the start.
How Replika works: the core user flow
How many apps and dashboards do you need?
Mobile app
The iOS and Android app where users chat by text, voice and video with their avatar.
Moderation and safety panel
The panel for managing risky conversation signals, complaints and age verification processes.
Admin panel
The panel for personality settings, the avatar store, subscriptions and usage metrics.
Critical features of a product like Replika
Personal memory
Important details users share are saved in structured memory, and users can see and edit what is remembered.
Customisable avatar
Appearance, outfits and room decor are personalised, and the avatar uses expressions and movement while talking.
Voice and video calls
Users have real-time voice calls with their avatar, using low-latency audio streaming.
Mood and journal
Daily mood logging and short reflection questions track the user's emotional state.
Safety guardrail layer
When signals such as self-harm are detected, the conversation switches to safe mode and helpline information is shown.
Age verification
An age check is done at sign-up, and adult content and certain relationship modes open only to verified adults.
What goes into the first version, what comes later
First version (MVP)
- Avatar creation and basic customisation
- Text chat with memory
- Age verification and content filter
- Crisis-signal detection and help redirection
- Subscription and a free trial
Later releases
- Voice and video calls
- Avatar store and room decor
- Augmented reality avatar
- Mood tracking and personal growth programmes
Modules and how the budget is calculated
The budget is calculated with 360 SOFT’s pricing model from the modules below, about 22 screens and the project’s complexity: roughly 78 person-days for the full scope and 55 person-days for the first version. Every module you drop lowers the budget directly.
| Module | Phase |
|---|---|
| Sign-up, login, social login | First version |
| User profile and settings | First version |
| Admin dashboard | First version |
| Subscriptions and recurring billing | First version |
| Online payments (Stripe / PSP) | First version |
| AI features (LLM, RAG, recommendations) | Later release |
| Real-time messaging | First version |
| File, photo, video upload | First version |
| Video / voice calls | First version |
| Push notifications | First version |
| GDPR and security hardening | First version |
| Reporting and analytics | First version |
Hosting, SMS, map APIs, app store accounts and payment-provider fees are separate items. Maintenance and improvements (optional): €300 / month. We send a fixed written price within 24 hours after a free discovery call.
The hard parts
Ethical and psychological risk
There is a risk of emotional dependence and deepening loneliness, so usage-time reminders and transparent communication are needed.
Store policy and regulation
AI companion apps are under close watch in store review and, in some countries, by regulators, so the content policy must be clear.
Cost of personalisation
Memory, long context and voice processing for every user add cost, so summarisation and smart model selection are essential.
Business model
A subscription is the main revenue source; paid plans offer an advanced model, voice calls, relationship modes and unlimited memory. Avatar outfits, room items and special events can be sold with an in-app currency. Aggressive selling that exploits emotional attachment should be avoided; transparent pricing and easy cancellation protect both trust and store compliance.
Get a free quote for your project
Let us scope it together and send a fixed written quote within 24 hours. NDA on request; you own the source code.
Choosing a company to build an app like Replika
Most people searching “build an app like replika” are really looking for a reliable app development company. When comparing quotes, check four things:
- Can you try similar products they have shipped, in the stores or live?
- Are the source code, design files, servers and store accounts transferred to you by contract?
- Do they show a working demo every two weeks, with written scope and acceptance criteria?
- Are maintenance, scaling and GDPR/security costs written into the quote?
Copyright and trademarks
A business model and features are generally not protected on their own, but the Replika name, logo, interface design, content and source code are. That is why we build a product with similar functionality but your own brand, design and code. This is not legal advice; we recommend a trademark search before launch.
Frequently asked questions
How long does it take to build an app like Replika?
A first release with an avatar, memory-based chat and a safety layer can be ready in a few months. Voice and video calls and 3D avatar animations stretch the timeline noticeably.
Which safety measures are essential in an AI companion app?
Age verification, content filters, crisis-signal detection and redirection to help resources are non-negotiable. These measures protect users and are also required for store approval.
Will there be copyright or trademark issues?
The AI companion business model is generally free to use; however, the name, logo, avatar designs, copy and code cannot be copied. This is general information, not legal advice.
What should I look for when choosing a company to build an AI companion app?
Choose a team with experience in LLM memory architecture, real-time voice and moderation. Ask about their ethical principles and how crisis scenarios will be tested.
