Comparison

Sub vs Shared Couple Diary ~ Futari

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

Head to head
About

Sub

Features
Read full description

Sub is designed with the clinical experience and guidance of a couples therapist. Sub is not therapy or a diagnostic tool — it is your own judgment-free space for reflection. Sub is a quiet evening companion for your relationship. No feeds, no chat, no daytime noise. Sub stays silent through the day and listens only at night. When the day ends, you speak for two minutes and mark three simple lines — warmth, time together, closeness. Through the night, Sub weaves what you said into a calm, personal reflection that returns to you in the morning. Your voice is enough. You don't need to form perfect sentences. Sub notices not only what you say, but the tone underneath it — softening, tension, a held breath — and gently mirrors the moment back so you feel seen. WHAT SUB DOES • Nightly voice reflection — two minutes, then a warm morning note • Voice tone observations, never judgment or advice • A single inward question to sit with — never a to-do • Archive & heatmap — see the pattern of your nights over time • Emergency mode — one short minute when a day overflows SUB PRO • Deep Voice Anatomy — the feeling beneath your tone • Memory & detail tracking — quotes that return when they matter • Smart Bridge — an invisible bridge if your partner joins • Relationship Map — a weekly trace on warmth and trust Try 3 days free, then $3.99/month or $34.99/year. Cancel anytime. YOUR PRIVACY Your voice is processed to create your reflection and then deleted — it is never stored on our servers. You can delete your account and all data at any time. Sub is a companion for self-reflection, not a substitute for professional help or medical advice. Available in English, Türkçe, Français, Italiano and Русский. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://sub.1000crypto.site/gizlilik

About

Shared Couple Diary ~ Futari

This app offers a private space for couples to journal their thoughts and feelings separately, then share them simultaneously. It provides daily prompts, gentle phrasing suggestions for difficult conversations, and features to strengthen your connection.

Highlights
  • Shared private diary entries
  • Daily relationship prompts
  • Gentle phrasing suggestions
  • Simultaneous entry reveal
  • Days-together counter
  • Couple quizzes
  • Anniversary countdowns
Features
Read full description

Futari is the gentle, private diary made for two. Write your day separately, then open each other's pages together, at the very same moment. A SOFTER WAY TO CHECK IN Every day gets a little prompt to inspire you both — something that made you smile, something on your mind, something to look forward to. No pressure, no streak-shaming, just a small ritual that's yours. SAY HARD THINGS, GENTLY When something you write sounds like it might sting, Futari quietly offers a softer way to say it — so difficult feelings turn into words you'd actually want to send. Built for the moments that are hard to bring up out loud. OPEN EACH OTHER'S PAGES, TOGETHER Write on your own time. When you've both finished, reveal each other's entries at the exact same moment — no peeking early, no one left waiting to be seen. EVERY DAY, A LITTLE CLOSER - Days-together counter, from the day you met - Writing streaks for you and your partner - A daily "how well do you know me" couple quiz - Anniversary and special-day countdowns you'll never miss - A shared goal and your next plans together WORKS SOLO, TOO No partner paired up yet? Futari still works beautifully as your own private diary — your own prompts, your own goals, your own streak. YOUR LANGUAGE, YOUR LOVE STORY Futari is fully translated into English, Spanish, French, German, Italian, and Japanese, with more on the way — because the little things you want to say to each other deserve to feel natural. PRIVATE, ALWAYS No ads. No tracking. No public feed. These pages exist for the two of you and nobody else. FUTARI PREMIUM (OPTIONAL) Pair with your partner, add unlimited anniversaries and special days, and export your whole story anytime — with monthly and yearly auto-renewing subscription options. Manage or cancel anytime in your Apple ID settings. Start your shared story today. Terms of use: https://futari-nine.vercel.app/terms Privacy Policy: https://futari-nine.vercel.app/privacy Support: https://futari-nine.vercel.app/support

Screenshots

Sub4 screens
Shared Couple Diary ~ Futari4 screens

Verdict

The call

The clearest difference is update cadence: Sub at every 3 days against Shared Couple Diary ~ Futari's every 3 weeks. Sub also leads on iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases 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. Sub sells 2 in-app purchases, starting at $3.99 per month and Shared Couple Diary ~ Futari sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Sub ships an update every 3 days, Shared Couple Diary ~ Futari every 3 weeks. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 7 level
Sub versus Shared Couple Diary ~ Futari: the parameters behind the verdict, then further details
ParameterSubShared Couple Diary ~ Futari
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 3 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.1 — better17.0
Further details — not scored
Size48 MB62 MB
Age rating4+12+
DeveloperBerkan ARIKANKosei Endo

In-app purchases

2 purchases

Sub

Subscriptions2
  • Sub Pro Monthly3 Days trial$3.991 Month
  • Sub Pro Annual3 Days trial$34.991 Year
2 purchases

Shared Couple Diary ~ Futari

Subscriptions2
  • Futari pro$1.991 Month
  • Futari Premium$19.991 Year

Questions

Is Sub free?
Sub is free to download, with in-app purchases available.
Is Shared Couple Diary ~ Futari free?
Shared Couple Diary ~ Futari is free to download, with in-app purchases available.
Do Sub or Shared Couple Diary ~ Futari have ads?
Neither Sub nor Shared Couple Diary ~ Futari shows ads.
Which is updated more often, Sub or Shared Couple Diary ~ Futari?
Sub ships an update every 3 days, and Shared Couple Diary ~ Futari every 3 weeks. Most recently, Sub was updated on October 25, 2026 and Shared Couple Diary ~ Futari on October 31, 2026.

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