Asympta Writing vs Voice AI Planner
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Asympta Writing
Read full descriptionHide full description
Asympta Writing is a quiet, infinite canvas for handwritten notes, sketches, words, and ideas, with natural sound and gently changing light. • Write and draw with Apple Pencil, or add typed text with an adjustable size preview • Organize your writing into separate Spaces and return to earlier thoughts on a spatial canvas • Choose paper with moving leaf shadows, an open sky with drifting clouds, or a night sky with stars • Listen to wind, sea ambience, or summer-night insects and frogs with an independent volume control • Enable background playback in the sound controls to keep ambience playing on the Home Screen and while your device is locked • Use the eraser, move and focus tools, and export your canvas as a PNG image The free plan includes every canvas tool, local storage, up to three Spaces, and iCloud sync when your device has an available iCloud account. You can use the canvas offline without an Asympta account. One non-consumable lifetime purchase unlocks Asympta Pro: unlimited Spaces, optional Google Drive backup, merge and recovery between your existing iCloud and Google Drive accounts, and two one-time discounted App Store invitation slots. iCloud sync itself remains free. The purchase does not include additional iCloud or Google Drive storage. Google Drive connection is optional and uses only the app data scope. Invitation links open Apple's App Store redemption flow, where Apple displays the local price. Asympta contains no ads, third-party analytics, or cross-app tracking.
Voice AI Planner
Read full descriptionHide full description
An AI planner that lets you capture what’s on your mind just by speaking. Say your to-dos all at once, and AI sorts them into lists for Soon, Later, and Someday. Your plans, feelings, and records of what you’ve accomplished—all on one screen. Created by a developer with ADHD as an AI planner they could keep using in everyday life. You don’t have to keep a perfectly organized schedule. When something comes to mind, just write it down. Completed plans automatically become records, while your feelings and activities are saved alongside them as part of the same day. Things to do right now. Things to do someday. Important things you don’t want to forget. What you’re feeling in this moment. Instead of keeping everything in your head, give each thought a place—and come back to it whenever you need to. -------------------- What is brain dumping? Brain dumping means writing down everything on your mind to help you feel clearer. Sometimes described as a form of meditation through writing, it may help free up working memory and make it easier to process thoughts and memories. Other potential benefits include better focus, reduced stress and anxiety, improved memory retention, and more efficient learning. -------------------- ■ Organize your plans, feelings, and activities in one place • PLANS: What you’re going to do. • THOUGHTS: What you’re feeling right now. • LOG: What you did today. • TODO: What to do soon, later, or someday. The background shifts through morning, daytime, evening, and night at the times you choose. Let the sun and moon accompany you throughout your day. You can also keep your favorite time of day on screen. Your plans, todos, journal entries and other records are stored on your device. AI voice input sends data to external services. HITUKI’s relay server does not store the text content. With HITUKI+, you can access AI-powered voice input, weekly reports, list views, weather, recurring entries, multiple photos, widgets, and more—making everyday life easier to organize. Not to manage everything perfectly, but to get things out of your head and make each day feel a little easier. Whether you have ADHD traits or not, we hope HITUKI can lend a hand in your everyday life. Have a feature request or an idea? We’d love to hear from you. /// Give HITUKI a try! /// Try the annual plan free for 7 days. /// Core features are always free. Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: Voice AI Planner at every 2 days against Asympta Writing's weekly. Asympta Writing's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement 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. Asympta Writing sells 1 one-off in-app purchase and Voice AI Planner sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
Asympta Writing ships an update weekly, Voice AI Planner every 2 days. The most recent releases landed on October 25, 2026 and October 14, 2026 respectively.
| Parameter | Asympta Writing | Voice AI Planner |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, Mac — better | iPhone |
| Requires iOS | 17.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 24 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Ka ho Lau | Daisuke Tamura |
In-app purchases
Asympta Writing
- Asympta Pro Lifetime$29.99
Voice AI Planner
- HITUKI+ Monthly$1.991 Month
- HITUKI+ Annual7 Days trial$9.991 Year
- HITUKI+ Lifetime$34.99







