Calculator Notes vs Chatika
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calculator Notes
This app combines a calculator with spreadsheet functionality, allowing users to automatically sum item values. It supports unlimited folders and notes, with features like goal setting and batch operations. Widgets are available for home and lock screens.
- Automatic total value calculation
- Unlimited folders, notes, and items
- CSV output and sharing
- Goal setting and progress tracking
- Batch operations (copy, duplicate, color coding)
- Home & lock screen widgets
- Dark mode
Read full descriptionHide full description
It is a calculator notepad that automatically calculates the total value. A simple spreadsheet application. Widget compatible. All features are completely free to use. - Unlimited folders/notes/items - Automatically calculate the total value of items - CSV output / save file / share to SNS - Set goals and deadlines and display percentages - Batch operations such as copy/duplicate/color coding - filter and sort - Consumption tax calculation and fixed cost settings - Easy input from history - Home & lock screen widget support - dark mode
Chatika
This AI chat client offers extensive customization and privacy for your conversations. It acts as a private browser for AI, allowing you to connect with various AI models using your own API keys without data storage on external servers. Enjoy features like web search, image support, and dynamic prompt adjustments.
- Bring Your Own Key (API)
- Rich Chat Actions (quote, fork, revert)
- Web Search integration
- Image support for AI models
- Customizable Persona System
- Dynamic AI parameter settings
- Thought Process View
Read full descriptionHide full description
Chatika is a free AI chat client that gives you complete freedom, flexibility, and privacy in your AI conversations. Think of it as a highly customizable private browser or Lego builder for AI chat — a pure client that facilitates communication with AI providers (cloud or local), without storing anything outside your device. Currently, the app UI supports English and 中文 (Simplified Chinese). AI chats themselves can be carried out in most languages. (More UI language options coming soon!) Key Features: • Bring Your Own Key – Chat with any supported AI model using your own API keys. No subscriptions required. • Rich Chat Actions – Select & quote, fork conversations, revert messages, regenerate replies. • Web Search – Search and chat with real-time information from the internet. • Image Support – Send images to compatible AI models. • Persona System – Built-in personas with the option to create and customize your own. • Custom System Prompts – Inject or modify prompts to shape AI behavior. • Dynamic Settings – Change parameters mid-conversation. • Thought Process View – See how reasoning models think step-by-step (for supported models). Chatika is designed for users who value control, privacy, and customization in their AI interactions. Whether you’re a writer, developer, researcher, or simply curious about AI, Chatika has a mode and persona that fits you. This is an indie project with no monetization plans. Your support and feedback are always welcome!
Screenshots
Verdict
The clearest difference is ads: Chatika at none against Calculator Notes's shown. Chatika also leads on update cadence (fortnightly vs every 12 months) and monetization model (free vs ad-supported). On price, rating, review sentiment and ratings volume 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for Calculator Notes against 5.0 for Chatika. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
Calculator Notes ships an update every 12 months, Chatika fortnightly. The most recent releases landed on September 21, 2026 and October 5, 2026 respectively.
| Parameter | Calculator Notes | Chatika |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) | 5.0 (2 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 3 — better | 2 |
| Update frequency | Every 12 months | Fortnightly — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 26.0 | 17.1 — better |
| Further details — not scored | ||
| Size | 11 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | FugaPiyo Inc. | Chenxing Liu |
Customer experience
Calculator Notes
Chatika
In-app purchases
Calculator Notes
No in-app purchases
Chatika
No in-app purchases









