Comparison

Sentiens vs Chatmark

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

Chatmark

Features
Read full description

Chatmark gives you a simple way to: - Organize conversations from multiple AI apps Key Features - Save chats from AI apps instantly via Share Sheet - Import ChatGPT shared links with structured parsing - Clean, readable conversations (user / AI separation) - Markdown support for better readability - Local storage (your data stays on your device) Privacy First - Chatmark stores everything locally on your device. No accounts. No cloud. No tracking.

Screenshots

Sentiens4 screens
Chatmark4 screens

Verdict

The call

The clearest difference is update cadence: Sentiens at every 2 days against Chatmark's every 6 weeks. On price, ads, in-app purchases and device support 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, Chatmark every 6 weeks. The most recent releases landed on October 31, 2026 and October 18, 2026 respectively.

Scorecard1 real difference · 8 level
Sentiens versus Chatmark: the parameters behind the verdict, then further details
ParameterSentiensChatmark
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 2 days — betterEvery 6 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.016 — better
Further details — not scored
Size145 MB27 MB
Age rating4+4+
DeveloperBK KejeraTaeeun Kim

In-app purchases

None

Sentiens

No in-app purchases

None

Chatmark

No in-app purchases

Questions

Is Sentiens free?
Sentiens is free to download, with no in-app purchases.
Is Chatmark free?
Chatmark is free to download, with no in-app purchases.
Do Sentiens or Chatmark have ads?
Neither Sentiens nor Chatmark shows ads.
Which is updated more often, Sentiens or Chatmark?
Sentiens ships an update every 2 days, and Chatmark every 6 weeks. Most recently, Sentiens was updated on October 31, 2026 and Chatmark on October 18, 2026.

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