Comparison

Sentiens vs BTS Chatter

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

Head to head
About

Sentiens

Create and customize your own private AI companion with distinct personalities, evolving memories, and adaptive behaviors. This offline platform offers deep control over your AI's intelligence and data ownership, running entirely on your device.

Highlights
  • Fully offline AI experience
  • Create and customize Sentien personalities
  • Dynamic, evolving memory system
  • Neural voice customization
  • Vision intelligence for image understanding
  • Choice of AI model sizes
  • Private by design with data ownership
Features
Read full description

Sentiens is a private offline AI where you create your own Sentien with distinct personalities, neural voices, evolving memories, and adaptive behaviors. Each Sentien is fully customizable. Define how it thinks, speaks, responds, and grows over time using advanced personality controls, an AI training center and dynamic memory designed to create a deeply personal intelligence experience. Sentiens runs directly on your device as a fully offline AI platform, giving you speed, privacy, and complete control over your data without relying on constant cloud access. You can also choose the model that powers your Sentien. Larger parameter models deliver deeper reasoning, stronger understanding, and more intelligent responses, while smaller models provide faster, lightweight performance. Intelligence scales with your choice. FEATURES • Fully offline AI experience • Create and customize your own Sentien • Dynamic memory that evolves over time • Adaptive learning and context retention • Neural voice customization with 12 slider controls for Voice AI • Vision intelligence for image understanding • Modular AI architecture for expandable intelligence • Modular Local LLMs • Native device actions and command system • Fast on device processing • Choose between model sizes for performance or intelligence • Private by design with full data ownership Sentiens is not just an assistant. It is a platform for creating intelligent beings that grow with you. Design your Sentien. Shape its mind. Own your intelligence.

About

BTS Chatter

Features
Read full description

Chatter - Your agents. Your tools. Your data. Chatter is the AI chat app we built for ourselves - because we wanted frontier-quality answers without handing our conversations to yet another data-hungry platform. Now it's yours too. Chatter runs on Ollama Cloud with zero data retention: your prompts and answers are processed, streamed back, and gone. Nothing stored server-side, nothing used for training. Just fast inference on powerful open models - and a native, lightweight app on iPhone, iPad, and Mac that stays out of your way. Private by design. No account, no sign-up, no login - enter your API key and start chatting. We collect nothing: no analytics, no tracking, no telemetry. Your chats, agents, and knowledge live on your devices and sync exclusively through your personal iCloud (Apple CloudKit), end-to-end within your own Apple ID. We couldn't read your data if we wanted to - and we don't want to. Build your own agents. Create assistants with their own personality, model, and toolset - a coding expert, a research companion, a home-automation operator. Each agent is exactly as capable (and as locked-down) as you decide. Give them tools with MCP. Connect any Model Context Protocol server - self-hosted on your LAN, over Tailscale, or anywhere else. Your agents can query your databases, control your smart home, or reach your internal APIs. Your infrastructure stays yours. Give them knowledge. Attach curated knowledge bases to any agent - import PDFs or Markdown, and your agent reads exactly the documents it needs, when it needs them. Watch them grow. Agents remember what matters: they keep their own notes about you and your projects across chats, and they can even write down reusable skills - procedures you teach them once and they follow forever. You stay in control: everything they learn is visible, editable, and deletable. Everywhere you are. One app for iOS and macOS, with your agents, chats, and knowledge synced privately through iCloud. No subscription. No middleman. No tracking. Chatter is a native client for your own Ollama Cloud account - bring your API key, and own your AI. **Requires an Ollama Cloud API key (ollama.com). Chatter connects directly to Ollama Cloud and to MCP servers you configure; we run no servers of our own.**

Screenshots

Sentiens4 screens
BTS Chatter4 screens

Verdict

The call

The clearest difference is update cadence: Sentiens at every 2 days against BTS Chatter's every 2 weeks. BTS Chatter's advantage is device support (4 vs 2). On price, ads, in-app purchases and iOS requirement 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.

UpkeepUpdate frequency

Sentiens ships an update every 2 days, BTS Chatter every 2 weeks. The most recent releases landed on October 9, 2026 and October 1, 2026 respectively.

Scorecard2 real differences · 7 level
Sentiens versus BTS Chatter: the parameters behind the verdict, then further details
ParameterSentiensBTS Chatter
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 2 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, Mac, Apple Watch — better
Requires iOS17.017.0
Further details — not scored
Size145 MB16 MB
Age rating4+17+
DeveloperBK KejeraFabian Ackle

In-app purchases

None

Sentiens

No in-app purchases

None

BTS Chatter

No in-app purchases

Questions

Is Sentiens free?
Sentiens is free to download, with no in-app purchases.
Is BTS Chatter free?
BTS Chatter is free to download, with no in-app purchases.
Do Sentiens or BTS Chatter have ads?
Neither Sentiens nor BTS Chatter shows ads.
Which is updated more often, Sentiens or BTS Chatter?
Sentiens ships an update every 2 days, and BTS Chatter every 2 weeks. Most recently, Sentiens was updated on October 9, 2026 and BTS Chatter on October 1, 2026.

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