Comparison

Japan Chart Navi vs Aisea PRO

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

Head to head
About

Japan Chart Navi

This marine navigation app uses GPS to display your current position, orientation, and distance to your destination. It provides access to nautical charts and helps estimate fuel consumption for small boats, even in areas with limited radio signal.

Highlights
  • GPS-based positioning
  • Orientation and distance to destination
  • Nautical chart display
  • Fuel consumption estimation
  • Offline map data
  • Coastal area signal reception
Features
Read full description

*********************** This is a free version for tests. Please try this before you purchase the paid version. AppStore search screen "map of the sea" to search on other series will be displayed. All 45 will be commercialized by Japan in the Y map charts a single unit. Please wait for a while. *********************** (To use a lot of memory, iPhone3GS is officially supported or more) "The iPhone in the sea!" We developed this product based on this slogan. "Navigation map of the sea" is, GPS measured at sea using the current position, orientation to the destination, distance, and for marine navigation applications use to measure the approximate fuel. Even out of radio at sea, map (Y chart), so in the application has data to confirm the orientation can determine the current location and destination. Jet ski (Jet Marine), and motorboats as, GPS was not designed for use with small boats. iPhone waterproof pack (sold separately) into, the sea is also please phone us. Pick up a signal in coastal areas of Mobile, GPS to locate the precise, you can also request a quick rescue. It also features fuel and easy calculation, you can drift by as much as possible to prevent gas. (Thank you for such use to reference only) This app, like the Coast Guard Authorization "number of 222 505 Coast Guard permit" (based on publications like Business Law Article 25 water) has received. Partnership with Japan Hydrographic Association also like the latest "for example - motorboat yacht (Y Chart)" is used. The information is displayed to confirm the position of own ship. For more information about the time of sailing, please use the chart. Datum is used in this figure, "Datum world." "Map of the Sea Navigation (Select 1)" There are 45 in all. Check the map, like the site Hydrographic Association, "Internet shopping chart" Please confirm. "For example - yacht and motorboat (Y Chart)" You can see a map of the 45 items. The paper map also "Internet shopping chart" I have sold, according Please utilize. All content and maps please reference purposes only. Regarding the accident using this app, we can not assume any responsibility. GPS in commercial vessels is common in the leisure boat or jet ski facilities are still not common. The accidents in Japan, I really wish to reduce a little.

About

Aisea PRO

Features
Read full description

【本アプリは法人アカウント登録済みの法人ユーザ向けアプリです。一般の方向けのアプリ Aisea は別にございますのでご注意ください。】 ■あらゆる船情報を簡易に把握可能に AIS搭載船、アプリ利用船の情報、状況をわかりやすく可視化しております。 ■ 船の航行履歴を再生可能に 運航履歴を記録しているため、アニメーション再生を実現しており、航行の参考資料としての利用も可能にしております。 ■ 衝突予測&アラーム機能 お互いの船が操船し続けた場合の衝突時間予測表示をリアルタイムで実現しており、警告情報の通知が可能になっております。 ■アプリを所持するユーザー間で通話を可能に アプリ利用者同士での通話はもちろん、 工事単位や法人単位でのグループ無線や緊急時の通報もできます。 ■エリア作成・編集を可能に 工事エリア、危険エリアなど様々な情報を設定および発信を行うことができ、アプリを利用する船にも接近通知を行うことができます。 ■PCブラウザの管理画面でマネジメントを容易に 船の状況をリアルタイムで閲覧し、管理伝達を可能にしておりタブレット端末、スマートフォン、PCの連携で管理を可能にしております。 ■iPadの大画面なら、海図と船舶を見やすくお使いいただけます。 ■利用規約(Terms of Service) 利用規約については以下のページを参照してください。 https://aisea.net/terms.html ■ご注意 ・iPod touch、iPad Wi-Fiモデルなど非通信端末ではご利用になれません。 ・本サービスの案内に従い航行した場合であっても、事故等の損害について当社は一切責任を負いません。

Screenshots

Japan Chart Navi3 screens
Aisea PRO4 screens

Verdict

The call

The clearest difference is in-app purchases: Aisea PRO at none against Japan Chart Navi's 10. Aisea PRO also leads on update cadence (every 6 weeks vs every 3 months). Japan Chart Navi's advantage is iOS requirement (6.0 vs 15.6). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Japan Chart Navi sells 10 one-off in-app purchases. Aisea PRO asks for nothing beyond the download.

UpkeepUpdate frequency

Japan Chart Navi ships an update every 3 months, Aisea PRO every 6 weeks. The most recent releases landed on October 8, 2026 and October 7, 2026 respectively.

Scorecard3 real differences · 7 level
Japan Chart Navi versus Aisea PRO: the parameters behind the verdict, then further details
ParameterJapan Chart NaviAisea PRO
PriceFreeFree
Rating2.0 (4 ratings) — better—
Positive reviews66.7% of reviews—
Number of ratings4 — better—
Update frequencyEvery 3 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS6.0 — better15.6
Further details — not scored
Size42 MB86 MB
Age rating4+4+
DeveloperFujiDenshi.ComAidea Inc.

In-app purchases

10 purchases

Japan Chart Navi

One-time10
  • Hokkaido Simple Map$0.99
  • Izu Ogasawara Simple Map$0.99
  • Kyushu Simple Map$0.99
Show 7 more
  • Okinawa Simple Map$0.99
  • All Japan Simple Map Package$4.99
  • TOKYO WAN - OMAE SAKI$11.99
  • NORTHERN PART of OSAKA WAN$11.99
  • URAGA SIODO$11.99
  • NAHA - KERAMA RETTO$11.99
  • East Setouchi Area Package$54.99
None

Aisea PRO

No in-app purchases

Questions

Is Japan Chart Navi free?
Japan Chart Navi is free to download, with in-app purchases available.
Is Aisea PRO free?
Aisea PRO is free to download, with no in-app purchases.
Do Japan Chart Navi or Aisea PRO have ads?
Neither Japan Chart Navi nor Aisea PRO shows ads.
Which is updated more often, Japan Chart Navi or Aisea PRO?
Japan Chart Navi ships an update every 3 months, and Aisea PRO every 6 weeks. Most recently, Japan Chart Navi was updated on October 8, 2026 and Aisea PRO on October 7, 2026.

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