Comparison

DHC語学 vs Sebastian

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

Head to head
About

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.

Highlights
  • Downloadable audio content
  • Audio playback
  • Background audio playback
  • Offline listening
Features
Read full description

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。

About

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.

Highlights
  • 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
Features
Read full description

“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

DHC語学2 screens
Sebastian4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
DHC語学 versus Sebastian: the parameters behind the verdict, then further details
ParameterDHC語学Sebastian
PriceFreeFree
Rating1.0 (1 ratings) — better—
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings1 — better—
Update frequencyEvery 4 monthsEvery 2 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS9.0 — better17.0
Further details — not scored
Size63 MB13 MB
Age rating4+4+
DeveloperDHC CorporationYuuki Nishimura

Customer experience

DHC語学

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews13 reviews
Positive0.0%
Neutral23.1%
Negative76.9%

Sebastian

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

DHC語学

No in-app purchases

2 purchases

Sebastian

Subscriptions2
  • Sebastian Pro$0.491 Month
  • Sebastian Pro$2.991 Month

Questions

Is DHC語学 free?
DHC語学 is free to download, with no in-app purchases.
Is Sebastian free?
Sebastian is free to download, with in-app purchases available.
Do DHC語学 or Sebastian have ads?
Sebastian shows ads; DHC語学 does not.
Which is updated more often, DHC語学 or Sebastian?
DHC語学 ships an update every 4 months, and Sebastian every 2 days. Most recently, DHC語学 was updated on November 3, 2026 and Sebastian on November 6, 2026.

Other comparisons