Comparison

Subrain vs AreaViz

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

Head to head
About

Subrain

This minimalist note-taking app helps you remember important keywords and life directions. It offers a simple interface for jotting down tasks and life-defining thoughts, acting as an extension of your memory.

Highlights
  • Simple note writing
  • Organized pages for notes
  • Minimalist interface
  • Acts as an extra brain
  • Helps remember keywords
  • Tracks life directions
Features
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์šฐ๋ฆฌ๋Š” ํ•˜๋ฃจ์—๋„ ๋งŽ์€ ์ผ์„ ์žŠ๊ณค ํ•ฉ๋‹ˆ๋‹ค. ๊ทธ๊ฒƒ์ด ํ•œ ์ฃผ, ํ•œ ๋‹ฌ... 1๋…„ ์ด์ƒ ๋ˆ„์ ๋˜๋ฉด, ์šฐ๋ฆฌ๋Š” ์–ผ๋งˆ๋‚˜ ๋งŽ์€ ์ค‘์š”ํ•œ ํ‚ค์›Œ๋“œ๋ฅผ ์žŠ์œผ๋ฉฐ ์‚ด์•„๊ฐ€๋Š” ๊ฑธ๊นŒ์š”? ์–ด์ฉŒ๋ฉด ์ธ์ƒ์˜ ํฐ ๋ฐฉํ–ฅ์ด ์กฐ๊ธˆ์”ฉ ๋ฐ”๋€” ์ˆ˜๋„ ์žˆ์Šต๋‹ˆ๋‹ค. ์ด๋Ÿด๋•Œ๋งˆ๋‹ค, Subrain์€ ๋‹น์‹ ์˜ ์ธ์ƒ์—์„œ ์ด์ •ํ‘œ ๊ฐ™์€ ์—ญํ• ์„ ํ•  ๊ฒƒ์ž…๋‹ˆ๋‹ค. ๊ฐ„๋‹จํ•œ ํ•  ์ผ๋ถ€ํ„ฐ, ์ธ์ƒ์— ๋Œ€ํ•œ ์ค‘์š”ํ•œ ํ‚ค์›Œ๋“œ๋ฅผ ๋งˆ์Œ๊ป ์ ์–ด๋ณด์„ธ์š”. Subrain์€ ๋ณต์žกํ•œ ๊ฑด ๋”ฑ ์งˆ์ƒ‰์ธ ๋ฏธ๋‹ˆ๋ฉ€๋ฆฌ์ŠคํŠธ๋ฅผ ์œ„ํ•œ ๋…ธํŠธ์ž…๋‹ˆ๋‹ค. ๋งˆ์น˜ ๋‘๋‡Œ๊ฐ€ ํ•˜๋‚˜ ๋” ์ƒ๊ธด ๊ฒฝํ—˜์„ ํ•ด๋ณด์„ธ์š”. ๋…ธํŠธ ์ž‘์„ฑ, ๊ทธ๋ฆฌ๊ณ  ๋…ธํŠธ๋“ค์ด ๋‹ด๊ธด ํŽ˜์ด์ง€. ์ด ๋‘ ๊ฐ€์ง€๋งŒ ๊ธฐ์–ตํ•˜์„ธ์š”. - We forget many things every day. If it accumulates over 1 month, 6 months... over a year, how many important keywords do we forget? Maybe the big direction of your life will change little by little. At times like this, Subrain will act like a milestone in your life. Feel free to write down everything from simple things to do to important keywords about your life. Subrain is a notebook for minimalists who hate complexity. Feel as if you have an extra brain. Just remember these two things: Writing notes and pages containing notes.

About

AreaViz

Features
Read full description

Use multiple AIs in one conversationโ€”as much as you need. Subscribing to multiple AI services on separate monthly plans can result in recurring charges even when you do not use them. AreaViz uses API keys issued by OpenAI, Anthropic, and Google, helping you manage costs based on actual usage under each providerโ€™s usage-based API pricing. Freely use different AI models in a single conversation. Switch models based on your question and compare answers from different perspectives. It is especially useful for people who want to use multiple AIs without the burden of subscribing to each service separately. โ–  Get started with your own API keys Register an API key issued by OpenAI, Anthropic, or Google and start chatting right away. There is no need to create an AreaViz account or sign in separately. AI API usage is billed directly to your account according to each providerโ€™s pricing and payment policies. AreaViz does not add a separate fee to API charges, and AI API usage is not included with an AreaViz Pro purchase. Your registered API keys are securely stored in the Keychain on your Apple device and are sent only to the corresponding AI providerโ€™s API server to process your requests. โ–  Conversations that continue across Apple devices AreaViz supports iPhone, iPad, and Mac. Conversations sync automatically through iCloud, so you can continue chatting naturally on another device. โ–  Ask with images and content - Attach photos taken with the camera or images from your photo library - Capture and mark up any area of your Mac screen, then ask about it immediately โ–  Faster on Mac Use global keyboard shortcuts to access AreaViz quickly while working in other apps. - Chat bar: โŒƒZ - Open app window: โŒƒโ‡งZ - Capture screen area: โŒƒX โ–  Start free, then purchase only once when you need more AreaViz is not a monthly subscription. Basic chat features are free, and registering your first API key unlocks a 7-day trial of all features. After the trial ends, you can continue using the following features within the free limits. - Screen capture and chat bar - Up to 3 prompts - Attach 1 image per message A one-time AreaViz Pro purchase permanently unlocks the following features. - Up to 24 prompts - Attach up to 4 images per message - Unlimited screen capture and chat bar use - Automatic question suggestions - Change the AI model for each response - Adjust the amount of conversation history sent to the model Users who previously purchased AreaViz tokens can use Pro at no additional cost. โ–  Privacy AreaViz does not require a separate account. API keys and conversation content are not stored on the developerโ€™s servers. API keys are stored in your deviceโ€™s Keychain, and conversation history is stored on your devices and in your personal iCloud. Content sent to an AI is delivered to the selected providerโ€™s API to generate a response and is subject to that providerโ€™s data-processing policies. โ–  Privacy Policy https://boardtack.com/AreaViz/privacy.html โ–  Terms of Use https://boardtack.com/AreaViz/terms.html

Screenshots

Subrain4 screens
AreaViz4 screens

Verdict

The call

The clearest difference is in-app purchases: Subrain at none against AreaViz's 1. Subrain also leads on iOS requirement (15.0 vs 17.0). AreaViz's advantage is update cadence (every 2 days vs every 8 days). On price, ads and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. AreaViz sells 1 one-off in-app purchase. Subrain asks for nothing beyond the download.

UpkeepUpdate frequency

Subrain ships an update every 8 days, AreaViz every 2 days. The most recent releases landed on October 30, 2026 and November 4, 2026 respectively.

Scorecard3 real differences ยท 5 level
Subrain versus AreaViz: the parameters behind the verdict, then further details
ParameterSubrainAreaViz
PriceFreeFree
Positive reviews100.0% of reviewsโ€”
Update frequencyEvery 8 daysEvery 2 days โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
MonetizationFreeโ€”
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.0 โ€” better17.0
Further details โ€” not scored
Size41 MB12 MB
Age rating4+4+
DeveloperJichan HwangBoardTack

In-app purchases

None

Subrain

No in-app purchases

1 purchases

AreaViz

One-time1
  • AreaViz Pro$29.99

Questions

Is Subrain free?
Subrain is free to download, with no in-app purchases.
Is AreaViz free?
AreaViz is free to download, with in-app purchases available.
Do Subrain or AreaViz have ads?
Neither Subrain nor AreaViz shows ads.
Which is updated more often, Subrain or AreaViz?
Subrain ships an update every 8 days, and AreaViz every 2 days. Most recently, Subrain was updated on October 30, 2026 and AreaViz on November 4, 2026.

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