Deep Dive vs Yoakari
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Deep Dive
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集中した時間の長さが、そのまま潜水艦の到達深度になります。 25分の集中で水深450m。90分なら1500m。深く潜るほど暗くなり、そこにしかいない深海生物と出会えます。集中を中断してアプリを離れると緊急浮上となり、その航海で捕らえた生物はすべて失われます。 実在の深海生物101種 マリアナ海溝の底に暮らすカイコウオオソコエビ、体長比で全魚類最大の牙を持つオニキンメ、鯨の骨だけを食べるホネクイハナムシ。すべて実在の生物で、それぞれに解説がついています。捕らえた生物は剥製として図鑑に収めるか、水槽で泳がせるか、港で売るかを選べます。 潜れる深さは、二つの要素で決まります コインで買える潜水艦の耐圧殻と、航海の回数だけで伸びる乗組員の胆力です。お金では買えない成長があります。海溝の最深部、チャレンジャー海淵の11,034mに到達するには、たくさんの航海が必要です。 集中のための音 低い環境音が途切れずに流れ、その上に泡の音がときどき乗ります。数分に一度、遠くで鯨が鳴きます。長時間かけっぱなしにする前提で設計してあり、耳が疲れる純音を含みません。周囲の物音を覆い隠す働きが期待できます。モノラルビートを含みますが、脳波への作用を主張するものではありません。 設定でオンオフが可能です。 ### そのほか - 5分から24時間まで、5分単位で設定できます - 電話や通知で一瞬離れても、90秒以内に戻れば航海は続きます - 潜った深さの累計を、東京スカイツリー何個分といった単位で表示します - 通信を行いません。データは端末内にのみ保存されます - 広告はありません --- 集中の深さを、水深で測る。
Yoakari
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When you try to open an app you chose, a night town appears. Choose “Don’t open it” and one more window lights up. You can also choose “Open for 5 minutes.” Nothing is taken away — you simply don’t get a light. After five minutes the screen comes back. As lights add up, buildings appear: a bathhouse, an old bookshop, a café, a lantern alley, a lighthouse. You can name every building you build. ■ What you can do ・Choose which apps bring up the screen ・See how often you stopped and how often you opened, on a 7-day chart ・Collect 24 kinds of buildings, plus one that shows up only rarely ・Set the hours the screen can appear (one-time purchase) ■ Nothing is forced Yoakari never makes an app permanently unusable. Choose “Open for 5 minutes” and you can use it. It is one quiet beat, so the choice stays yours. ■ About your records Your counts and the names you give buildings stay on this iPhone. Nothing is sent to the developer. No account is required. There are no ads. ■ About the purchase “Opening Night” is a one-time payment. There is no monthly fee. The free version lets you choose one app and build six kinds of buildings.
Screenshots
Verdict
The clearest difference is in-app purchases: Deep Dive at none against Yoakari's 1. Deep Dive also leads on update cadence (every 5 days vs every 3 weeks). On price, ads, device support 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. Yoakari sells 1 one-off in-app purchase. Deep Dive asks for nothing beyond the download.
Deep Dive ships an update every 5 days, Yoakari every 3 weeks. The most recent releases landed on October 8, 2026 and October 3, 2026 respectively.
| Parameter | Deep Dive | Yoakari |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone | iPhone |
| Requires iOS | 16.4 — better | 17.4 |
| Further details — not scored | ||
| Size | 34 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | YUTO DOI | Masato Oda |
In-app purchases
Deep Dive
No in-app purchases
Yoakari
- Opening Night$5.99








