Comparison

FirstSeed Notes vs Abyssal(アビサル)

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

Head to head
About

FirstSeed Notes

Capture, organize, and refine your thoughts with a beautifully designed note-taking app. Supports Markdown, task management, and transcription to create summaries and meeting minutes. Syncs across devices and offers customization options.

Highlights
  • Markdown-supported note creation and editing
  • Task management with ToDo lists
  • Highlighting important sentences
  • Recording and transcription capabilities
  • Note categorization with tags
  • Cross-device syncing via iCloud
  • Customizable font size and line spacing
Features
Read full description

FirstSeed Notes is a beautifully designed notes app that helps you capture your thoughts and turn them into ideas you can build on. Write down what's on your mind, organize it with notebooks and tags, and come back to it anytime. From quick notes and to-do lists to meeting recordings and study notes, FirstSeed Notes keeps your thinking and your plans in one place. Write Comfortably - A clean, simple editor that's easy to use every day - Markdown support and smart formatting - Add tables, equations, images, and links - Adjust font size and line spacing to suit your style - See character, word, and line counts at a glance - Export notes as Markdown or PDF Stay Organized - Organize notes with notebooks, sections, and tags - Keep important notes close with Favorites - Jump back to recent notes instantly - Manage tasks with to-do lists - Highlight key sentences and review them all in one place Record and Summarize - Record audio and get a transcript automatically - Turn transcripts into summaries, meeting minutes, action items, study notes, and more with AI AI Agent - Just ask the AI Agent to find, organize, tag, and move your notes Sync and Share - Sync your notes across your devices with iCloud - Share a single note or an entire notebook and edit together in real time - Invited members can join for free Your notes are synced and shared through iCloud. Some features require a subscription or a lifetime purchase. About Subscription: Payment will be charged to your Apple ID account at the confirmation of purchase. Subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions by going to your account settings on the App Store after purchase. Terms of Use: https://firstseed.io/terms.html

About

Abyssal(アビサル)

This app transforms focused work sessions into a deep-sea diving adventure. As you concentrate, you descend into the ocean, encountering marine life and building a personal aquarium. It encourages consistent focus without pressure, visualizing your progress through detailed statistics and a growing collection of discovered sea creatures.

Highlights
  • Deep-sea diving visualization for focus sessions
  • Encounter and collect unique marine life
  • Personalized aquarium to display creatures
  • Non-punitive design for sustained focus
  • Discover and catalog over 30 sea creatures
  • Weekly statistics and streak tracking
  • Multiple timer modes including Pomodoro
Features
Read full description

集中する=深海へ潜る。新感覚の集中タイマー スマホを置いて集中するたびに、あなたは深海へと沈んでいく。 1分の集中 = 1mの潜水。25分のポモドーロで25m。積み重ねた集中が、深海への旅になる。 【深海生物との出会い】 タイマー完了のたびに、深度に応じた生物に遭遇。表層ではクマノミやマンタ、深くなるほどチョウチンアンコウやメンダコなど幻想的な生物が現れる。完全集中(アプリを離れない)だとレア出現率2倍! 【あなただけの水槽】 出会った生物が「マイ水槽」に住み着く。横スクロールで水面から深海まで、ゆらゆら泳ぐ生物たちを眺めよう。深く潜れば潜るほど、水槽が豊かになっていく。 【罰しない設計】 途中でやめても、生物は死なない。完全集中を達成すると、よりレアな生物に出会いやすくなるだけ。プレッシャーなく、自分のペースで続けられる。 【深海図鑑】 30種以上の深海生物を発見しよう。未発見の生物はシルエットで表示。「深度1000m付近に生息」のヒントを頼りに探せ。 【記録・統計】 週次グラフでカテゴリ別の集中時間を可視化。連続日数(ストリーク)で継続のモチベーションを維持。累計深度があなたの努力の証。 【シンプルな操作】 (1) 「潜る」ボタンをタップ (2) カテゴリ(勉強/仕事/読書/その他)と時間を選ぶ (3) スマホを置いて集中するだけ 対応タイマー: ポモドーロ(25分)/ 集中(50分)/ ショート(10分)/ カスタム(1〜180分) BGM: 深度帯ごとに自動切替(波音 > 水中反響 > 低音ドローン) 【プレミアムプラン ¥380/月 / ¥3,200/年】 - 広告完全非表示 - BGM全15種 - 水槽カスタマイズ(背景・光源の色変更) - 図鑑の詳細情報(豆知識・実際の映像リンク) - 高解像度水槽エクスポート(透かしなし) - カテゴリ数無制限 - 集中統計の詳細分析 Forest・gogh・魚が育つアプリの次を探している人に。 深海という比喩が、集中するほど正しくなっていく。 利用規約: https://qtarou11111.github.io/abyssal-web/terms.html プライバシーポリシー: https://qtarou11111.github.io/abyssal-web/privacy.html

Screenshots

FirstSeed Notes4 screens
Abyssal(アビサル)4 screens

Verdict

The call

The clearest difference is review sentiment: FirstSeed Notes at 76% against Abyssal(アビサル)'s 0%. FirstSeed Notes also leads on ads (none vs shown) and update cadence (fortnightly vs every 2 months). Abyssal(アビサル)'s advantage is iOS requirement (13.0 vs 26.0). On price, in-app purchases, monetization model 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. FirstSeed Notes sells 5 in-app purchases, starting at $2.99 per month and Abyssal(アビサル) sells 1 in-app purchase, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

FirstSeed Notes ships an update fortnightly, Abyssal(アビサル) every 2 months. The most recent releases landed on October 31, 2026 and October 28, 2026 respectively.

Scorecard4 real differences · 6 level
FirstSeed Notes versus Abyssal(アビサル): the parameters behind the verdict, then further details
ParameterFirstSeed NotesAbyssal(アビサル)
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews76.5% of reviews — better0.0% of reviews
Number of ratings1 — better—
Update frequencyFortnightly — betterEvery 2 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS26.013.0 — better
Further details — not scored
Size116 MB262 MB
Age rating4+4+
DeveloperFirstSeed IncRyutaro Nakano

Customer experience

FirstSeed Notes

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews17 reviews
Positive76.5%
Neutral11.8%
Negative11.8%

Abyssal(アビサル)

Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

In-app purchases

5 purchases

FirstSeed Notes

Subscriptions4
  • Personal Monthly7 Days trial$2.991 Month
  • Team Monthly7 Days trial$9.991 Month
  • Personal Yearly1 Month trial$26.991 Year
Show 1 more
  • Team Yearly1 Month trial$95.991 Year
One-time1
  • Lifetime$49.99
1 purchases

Abyssal(アビサル)

Subscriptions1
  • Abyssal Premium Monthly$1.991 Month

Questions

Is FirstSeed Notes free?
FirstSeed Notes is free to download, with in-app purchases available.
Is Abyssal(アビサル) free?
Abyssal(アビサル) is free to download, with in-app purchases available.
Do FirstSeed Notes or Abyssal(アビサル) have ads?
Abyssal(アビサル) shows ads; FirstSeed Notes does not.
Which is updated more often, FirstSeed Notes or Abyssal(アビサル)?
FirstSeed Notes ships an update fortnightly, and Abyssal(アビサル) every 2 months. Most recently, FirstSeed Notes was updated on October 31, 2026 and Abyssal(アビサル) on October 28, 2026.

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