DHC語学 vs Sebastian
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DHC語学
This app complements DHC language courses and books by allowing users to download and play accompanying audio content. It supports background playback, enabling listening even when the screen is locked or other apps are in use. Access is restricted to course enrollees or book purchasers.
- Downloadable audio content
- Audio playback
- Background audio playback
- Offline listening
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DHC語学系通信講座および書籍の補助アプリです。 付属の音声をダウンロードしてお聴きいただけます。 ※受講生または書籍購入者の方以外はご利用いただけません。 ※DHC法人向け通信講座は新規受付を停止しております。 【主な機能】 ●ダウンロード機能 受講されている講座の音声データをダウンロードできます。 ※容量が大きいため、WiFi環境での接続をお勧めいたします。 ●音声プレイヤー機能 ダウンロードした音声を再生できます。 ●バックグラウンド再生機能 ロック画面やほかのアプリの使用中でも音声を聴くことができます。
Sebastian
Effortlessly add events and reminders to your calendar using natural language. This AI assistant understands your spoken or typed requests, confirming details before saving them. It also offers manual entry and integrates with your device's native calendar.
- Natural language event and reminder creation
- Confirmation cards before adding events
- Automatic sorting to Calendar or Reminders
- Manual add/edit with full calendar options
- Home Screen widgets and Siri Shortcut
- Add events from images
- iPad support
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“Lunch with Mom tomorrow at noon.” “Pick up the dry cleaning this week.” Just say or type it — your personal AI butler, Sebastian, reads the date, time, and reminder, shows you a confirmation card, and only adds it to your calendar once you tap “Add.” No more fiddly date pickers. ■ WHAT SEBASTIAN DOES • Chat naturally, like texting a friend, and Sebastian turns it into a real event or reminder • Timed plans go to your iPhone Calendar; open-ended to-dos go to Reminders — sorted automatically • Every entry is shown on a confirmation card first. Nothing is ever added without your OK • Month / Week / Day calendar views — tap any date to see what's on • Tap an empty time slot to add an event directly • Full manual add/edit screens too, with the same options as Apple's own Calendar — URLs, repeat rules, and more • Home Screen widgets — Calendar (white) and Event List (black), each in Small / Medium / Large (plus Extra Large on iOS 27) — and a Siri Shortcut (“Hey Siri, Sebastian”) to jump straight into chat • iPad supported • Events are saved straight to your iPhone's own Calendar (EventKit), so they also show up on Apple HomeView's calendar face automatically • Add events from images — pick up to 3 photos, screenshots, or files in Chat; text is read on your device ■ HOW THE AI PARSING WORKS • Chat parsing runs on Anthropic's Claude on every device. Only the text you type or speak, or text read from an image on your device, is sent through our relay server to Anthropic — never the image itself, nor your name, contacts, calendar contents, or location • Free: 10 AI parses per month. Sebastian Pro: 100 per month (same Claude engine) • According to Anthropic, inputs received through its API are not used to train its models, and inputs and outputs are automatically deleted within 30 days (except to enforce its usage policy or where required by law) • In version 1.9.3 the AI destination changed from Google (Gemini) to Anthropic (Claude). Even if you agreed in an earlier version, a new consent sheet appears the first time you use AI parsing • Sebastian shows you what will be sent and where, and asks for consent first. Nothing is sent until you agree; turn it off anytime in Settings > AI Parsing (Claude) • If you don't consent, or you're offline, manual add/edit still works with no limits • Events and reminders themselves are stored only on your device and in your iCloud • Optional, off by default: share anonymized correction examples to improve accuracy • Anonymous usage statistics (app opens, session length, events created) — no message text, event contents, or personal data. Opt out anytime in Settings • No account or sign-in required, ever ■ SEBASTIAN PRO (optional, auto-renewing monthly subscription, ¥100/month) • Hides ads and raises your monthly AI parsing limit to 100 (free: 10/month) • Payment is charged to your Apple ID and renews automatically unless cancelled at least 24 hours before the end of the period. Manage or cancel anytime in iOS Settings > Apple ID > Subscriptions • If you were already subscribed to the previous ¥500/month "Sebastian Pro," your existing benefits (no ads, 30/day) continue unchanged ■ SHARING (optional, no sign-in required) • From the Sharing tab, create a group and send an invite link to see plans with family, friends, or coworkers • Shift workers: share your shift calendar with your team as "busy only" — coworkers see when you're free, never your private titles • Friends & family: share full titles in a separate group. Per group, choose which calendars to share • The group screen shows everyone's schedule in a month grid; "Who's free" shows the days everyone is open • No name, email, or sign-in required. Leave anytime via Settings > Other > "Delete Sharing Account," or by leaving an individual group • If you never open the Sharing tab, no data for this feature is ever sent ■ Terms of Use (EULA) / Privacy Policy https://drqururi.github.io/sebastian-legal/en/
Screenshots
Verdict
The clearest difference is review sentiment: Sebastian at 100% against DHC語学's 0%. Sebastian also leads on update cadence (every 2 days vs every 4 months). DHC語学's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price 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. Sebastian sells 2 in-app purchases, starting at $0.49 per month. DHC語学 asks for nothing beyond the download.
DHC語学 ships an update every 4 months, Sebastian every 2 days. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.
| Parameter | DHC語学 | Sebastian |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 — better | — |
| Update frequency | Every 4 months | Every 2 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 9.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 63 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | DHC Corporation | Yuuki Nishimura |
Customer experience
DHC語学
Sebastian
In-app purchases
DHC語学
No in-app purchases
Sebastian
- Sebastian Pro$0.491 Month
- Sebastian Pro$2.991 Month









