Achieva vs KnowTree
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Achieva
Read full descriptionHide full description
「Achieva」は、個人でも複数人でも使えるタスク管理アプリです。 タスクを階層構造で整理できるので、大量の情報も見やすく、管理しやすくなっています。 【主な特徴】 - 個人利用はもちろん、複数人でタスクやメモを共有可能 - 階層構造でタスクを整理、重要な情報をすぐに確認 - タスクの追加・編集・完了管理が直感的に操作可能 Achievaを使えば、日々のタスクやアイデアを効率的に管理し、チームでも個人でも生産性を最大化できます。 シンプルで使いやすいデザインなので、初めてでもすぐに操作可能です。
KnowTree
Read full descriptionHide full description
◆ Organize notes in a "hierarchy" — and everything becomes clearer With most note-taking apps, as information piles up, it becomes hard to see how things are connected. "KnowTree" organizes your notes hierarchically with parent-child relationships. Group related information together so you can always find it again. --- ◆ Key Features [Tree Structure] Create nodes with parent-child relationships. Organize like "Main Topic → Subtopic → Details." No limit on how deep you can go. [Flexible Workflow] Start from the big picture (top-down), or jot down small notes and group them later (bottom-up) — both approaches work great. [Rich Content] Supports Markdown, images, links, and code blocks. Create notes that are clear and easy to read. --- ◆ Great For • Systematically organizing what you've learned • Structuring reading notes to match a book's outline • Managing project information in a hierarchy • Organizing your thoughts before writing • Connecting scattered notes into a coherent structure --- ◆ Features [Basic] • Create, edit, and delete nodes • Organize nodes with parent-child relationships • Markdown support • Search across all nodes • Trash (recover accidentally deleted notes) [Data Management] • Create and restore backups • Import data [Premium] • Create multiple trees • Ad-free experience • Premium color themes • Add images within note content • Export nodes • Home screen widget *Available with a Premium subscription (monthly) --- ◆ About Premium Plan Unlock all features with a monthly subscription. • Remove ads for a distraction-free experience • Access more color themes • Manage multiple trees for different purposes • Add images directly to your notes • Export in Markdown format • Quick access from your home screen You can cancel your subscription at any time. --- EULA (Apple Standard License Agreement) This app is subject to the Apple Media Services Standard End User License Agreement (Standard EULA). Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Use Use of this app is subject to the following terms: KnowTree Terms of Use: https://uconpa.com/chishikinoki/terms/ Privacy Policy For information on how we handle user data: KnowTree Privacy Policy: https://uconpa.com/chishikinoki/privacypolicy/
Screenshots
Verdict
The clearest difference is in-app purchases: Achieva at none against KnowTree's 1. KnowTree's advantage is iOS requirement (15.1 vs 18.0). On price, update cadence, ads 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
Both are free to download. KnowTree sells 1 one-off in-app purchase. Achieva asks for nothing beyond the download.
Achieva ships an update every 2 weeks, KnowTree every 9 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.
| Parameter | Achieva | KnowTree |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 2 weeks | Every 9 days — better |
| Ads | Yes | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 61 MB | 51 MB |
| Age rating | 4+ | 4+ |
| Developer | Shuto Motoike | Ukon Ryohei |
In-app purchases
Achieva
No in-app purchases
KnowTree
- KnowTree Premium$4.99









