Comparison

Deep Dive vs What For? App Blocker & Focus

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

Head to head
About

Deep Dive

Features
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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。

About

What For? App Blocker & Focus

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You came to reply, not lose the next twenty minutes to the feed. What For? is an iPhone app blocker that helps you use distracting apps with a purpose and a stopping point. Write what you came to do, choose a time limit, then return to what matters. A PURPOSE AND A TIME LIMIT Reply to a message. Look up one thing. Post an update. Choose 5, 10, 15 or 30 minutes before opening a selected app. When time is up, the app is restricted again. NO REASON TO OPEN? CHOOSE “NOT NOW” A pause is a chance to notice an automatic habit. Leave the app closed when you do not need it, and see those choices in your records. HOW IT WORKS 1. Allow Apple Screen Time access and select an app you want to use more intentionally. 2. Open that app. On the restriction screen, tap to write a purpose, then use the notification to open What For?. You can also open What For? yourself. 3. Write your purpose and choose your time limit. Free requires completing a rewarded ad on every unlock, including the first use. An unavailable or unfinished ad does not unlock the selected app. 4. Return to your selected app from the Home Screen. What For? does not switch apps for you. 5. The app is restricted again when your time ends. Review whether you did what you intended. RULES THAT FIT YOUR DAY Adjust default time, daily limits and cooldowns for each selected app. Review your purposes, skipped openings and reflections on Home and in Records. NO ACCOUNT REQUIRED Your written purposes, notes and selected-app identifiers stay on your device. What For? does not read messages, posts or searches inside other apps. ADS AND ANALYTICS The main app includes ads, including rewarded ads for Free unlocks. AdMob may process device, advertising and diagnostic data. Firebase Analytics and Crashlytics collect usage and diagnostic data; you can turn this collection off in Settings. Written purposes and notes are not sent to these services. See the privacy policy for details. REQUIREMENTS Requires iPhone with iOS 17 or later and Apple Screen Time permission for app restrictions. Notifications help you return to What For? and receive reminders. What For? is a personal habit tool, not a medical service. MONTHLY MEMBERSHIPS Custom lets you choose rewarded ads, dismissible interstitial ads, or no ads anywhere in the app. Ad duration varies; a lighter style does not guarantee a shorter ad. Pro includes Custom and adds app-specific combinations of passwords, math, sentence copying and random codes, plus settings protection. These features do not prevent revoking OS permissions or uninstalling. Custom and Pro are monthly auto-renewable subscriptions. Local prices appear in the purchase screen. Cancel in App Store settings at least 24 hours before renewal to avoid the next charge. Restore purchases from the plans screen. Deleting the app or its data does not cancel a subscription. Privacy: https://nanishini.knknt.chatgpt.site/en/privacy Terms: https://nanishini.knknt.chatgpt.site/en/terms Apple standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Deep Dive4 screens
What For? App Blocker & Focus4 screens

Verdict

The call

The clearest difference is in-app purchases: Deep Dive at none against What For? App Blocker & Focus's 2. Deep Dive also leads on ads (none vs shown). On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. What For? App Blocker & Focus sells 2 in-app purchases, starting at $0.99 per month. Deep Dive asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 5 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 4 level
Deep Dive versus What For? App Blocker & Focus: the parameters behind the verdict, then further details
ParameterDeep DiveWhat For? App Blocker & Focus
PriceFreeFree
Update frequencyEvery 5 daysEvery 5 days
AdsNo — betterYes
In-app purchasesNo — betterYes
DevicesiPhoneiPhone
Requires iOS16.4 — better17.0
Further details — not scored
Size34 MB49 MB
Age rating4+4+
DeveloperYUTO DOIKanta Sato

In-app purchases

None

Deep Dive

No in-app purchases

2 purchases

What For? App Blocker & Focus

Subscriptions2
  • NANISHINI Custom$0.991 Month
  • NANISHINI Pro$3.991 Month

Questions

Is Deep Dive free?
Deep Dive is free to download, with no in-app purchases.
Is What For? App Blocker & Focus free?
What For? App Blocker & Focus is free to download, with in-app purchases available.
Do Deep Dive or What For? App Blocker & Focus have ads?
What For? App Blocker & Focus shows ads; Deep Dive does not.
Which is updated more often, Deep Dive or What For? App Blocker & Focus?
Deep Dive ships an update every 5 days, and What For? App Blocker & Focus every 5 days. Most recently, Deep Dive was updated on October 24, 2026 and What For? App Blocker & Focus on October 25, 2026.

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