Comparison

nikki vs Shirube

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

Head to head
About

nikki

This app allows you to keep a private diary with rich media. You can add photos, take notes in a chat format, and use it as a planner. Security features include password and biometric locks, with customizable themes to personalize your journaling experience.

Highlights
  • Insert pictures into diary entries
  • Chat-style memo function
  • Use as a future date schedule book
  • Password and biometric app lock
  • Various fun stamps
  • Customizable timeline themes (Pinboard, List, Calendar)
Features
Read full description

Wanna write your secret diary...?? Here is the perfect app for you!! ◎Functions 1. Pictures can be inserted into each article. 2. There is a memo function: You can take notes in a chat format. 3. It can be used as a schedule book by writing on a future date. 4. You can lock the app with a password. It corresponds also to Face ID, Touch ID. 5. There are various fun stamps. ◎Change the timeline theme as you like (3 types) 1. Pinboard type with an emphasis on photos 2. List type with an emphasis on articles 3. Calendar type with an emphasis on practicality

About

Shirube

Features
Read full description

Shirube is a private study for the questions that surface only at midnight. "What does this person really think of me?" "Should I keep going?" Hoshi, your quiet companion, helps untangle the swirl of feelings in your nighttime mind. WHAT YOU CAN DO - Write a question, draw one of seven Shirube cards - Begin with one of 24 question starters across six themes - Cards: Compass / Moon Shadow / Lone Star / Bridge / Lantern / Key / Mirror - Each card returns a gentle, personalized clue - Save threads per question for ongoing reflection - Questions and saved clues stay on your device WHEN TO USE - Sleepless nights when your head won't quiet - For questions you can't ask family or friends - When you can't put your feelings into words PRO FEATURES (Eligible new subscribers get a 3-day free trial on Weekly, then $1.99/week in the U.S.; or $29.99/year) - Unlimited draws (Free: 1/day) - All 24 question starters (Free: 6) NOTE Shirube is a tool for reflection, not a fortune-telling app. It does not predict the future. Subscription - Weekly: eligible new subscribers get 3 days free, then $1.99/week in the U.S., auto-renewing - Yearly: $29.99/year in the U.S., auto-renewing - Renews automatically unless canceled 24 hours before period end - Cancel anytime in Settings > Apple ID > Subscriptions Support: info@starcrown.co.jp Privacy: https://starcrown.co.jp/privacy Terms (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

nikki4 screens
Shirube2 screens

Verdict

The call

The clearest difference is ads: Shirube at none against nikki's shown. Shirube also leads on update cadence (every 11 days vs every 2 months). nikki's advantage is iOS requirement (15.6 vs 17.0). On price, 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. nikki sells 2 one-off in-app purchases and Shirube sells 5 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

nikki ships an update every 2 months, Shirube every 11 days. The most recent releases landed on October 3, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
nikki versus Shirube: the parameters behind the verdict, then further details
ParameternikkiShirube
PriceFreeFree
Rating5.0 (5 ratings) — better—
Positive reviews98.1% of reviews—
Number of ratings5 — better—
Update frequencyEvery 2 monthsEvery 11 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.6 — better17.0
Further details — not scored
Size30 MB29 MB
Age rating4+4+
DeveloperREVOLAB Inc.Starcrown Inc

In-app purchases

2 purchases

nikki

One-time2
  • 添付画像を10枚にUP$2.99
  • 広告非表示(広告を外す)$7.99
5 purchases

Shirube

Subscriptions2
  • Weekly Pro3 Days trial$1.997 Days
  • Yearly Pro$29.991 Year
One-time3
  • Shirube Coffee Tip$0.99
  • Shirube Cookie Tip$1.99
  • Shirube Cake Tip$3.99

Questions

Is nikki free?
nikki is free to download, with in-app purchases available.
Is Shirube free?
Shirube is free to download, with in-app purchases available.
Do nikki or Shirube have ads?
nikki shows ads; Shirube does not.
Which is updated more often, nikki or Shirube?
nikki ships an update every 2 months, and Shirube every 11 days. Most recently, nikki was updated on October 3, 2026 and Shirube on October 31, 2026.

Other comparisons