Comparison

Nautilus vs Deep Dive

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

Head to head
About

Nautilus

Features
Read full description

For the hours you spend studying or working alone. While you dive, the apps you chose truly won't open. Exams, certifications, deep work included. Nautilus folds three things into one action: dive. REAL BLOCKING, AT THE OS LEVEL Tap to dive, and the apps you chose (social, YouTube, etc.) are shielded on the spot via Screen Time. Not a reminder — while you're diving, those apps genuinely won't open. Block sets change per focus type (e.g. Reading vs. Coding). DUMP A DISTRACTION IN 3 SECONDS A stray "I need to do that" mid-session? Jot it down from the Lock Screen or Dynamic Island in about 3 seconds, without leaving focus. Everything you dumped is waiting for you when you surface. SURFACE, AND IT'S ALREADY A JOURNAL When you surface, that session becomes a log entry automatically — what you dove into, how long, what distractions you dumped. No manual logging. DESIGNED FOR ZERO GUILT No red badges. A zero-minute day isn't punished. "Depth," the number that reflects your focus quality, only ever goes up. Blocking relies on the device's Screen Time framework.

About

Deep Dive

Features
Read full description

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。

Screenshots

Nautilus4 screens
Deep Dive4 screens

Verdict

The call

The clearest difference is iOS requirement: Deep Dive at 16.4 against Nautilus's 18.0. On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Nautilus ships an update weekly, Deep Dive every 5 days. The most recent releases landed on October 31, 2026 and October 24, 2026 respectively.

Scorecard1 real difference · 5 level
Nautilus versus Deep Dive: the parameters behind the verdict, then further details
ParameterNautilusDeep Dive
PriceFreeFree
Update frequencyWeeklyEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad — betteriPhone
Requires iOS18.016.4 — better
Further details — not scored
Size36 MB34 MB
Age rating4+4+
DeveloperHIROTO IGUCHIYUTO DOI

In-app purchases

None

Nautilus

No in-app purchases

None

Deep Dive

No in-app purchases

Questions

Is Nautilus free?
Nautilus is free to download, with no in-app purchases.
Is Deep Dive free?
Deep Dive is free to download, with no in-app purchases.
Do Nautilus or Deep Dive have ads?
Neither Nautilus nor Deep Dive shows ads.
Which is updated more often, Nautilus or Deep Dive?
Nautilus ships an update weekly, and Deep Dive every 5 days. Most recently, Nautilus was updated on October 31, 2026 and Deep Dive on October 24, 2026.

Other comparisons