64
BU Score
Solid
Shift Calendar / Schedule
✍️ BU Analytics Review
“
Shift Calendar / Schedule is an iOS app from Lin Chih-YU in the Productivity category, currently rated 4.5★ across 70 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Our BU Score puts it at 64 — Solid (established niche player). For a Productivity app, that means established niche player.
Track changes month-over-month in the Performance section below — live snapshot history and revenue forecast included.
creator
📊 Performance Tracking LIVE
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Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
Range:
💰 Forecast Revenue / mo
MODELRevenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 7 of 7 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| 5 starREVIEW | +$1,800 | |
| Mature app (10y old)METRIC | +$1,500 | |
| highly recommendREVIEW | +$1,400 | |
| annoying adsREVIEW | −$1,100 | |
| Good rating (4.5★)METRIC | +$800 | |
| Ad-supported / freemiumMETRIC | +$600 | |
| Pre-traction phase (70 ratings)METRIC | −$300 |
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)
📈 Reviews Growth
LIVECumulative review count from first BU snapshot. Each point = a tracked update.
💚Sentiment Over Time↑ green = positive · ↓ red = negative
Jun 24
Aug 24
Sep 24
Nov 24
Feb 25
May 25
Feb 26
⭐ Rating Trend
LIVEAverage rating evolution. Updates with each new review batch.
🗓️ Snapshot Timeline
HISTORYEach bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →💾 15 MB🔞 4+📱 iOS 9.0+🔖 v1.2.5🔄 updated 6y ago🌐 EN, RU, ZH, ZH📂 Productivity💰 Paid🚀 Launched 2015 (10y old)
📝 About this app
This app is designed for all hard-working shift workers. You can add customized shifts easily. The major feature of this App is 'Easy to Use'. When editing your shifts, you can select a range of days (rather than one day) to set. Thus, you can set your schedule (roster, planner) in few seconds. Then, you can send your schedule (roster, planner) to your friends via email or other apps by clicking one button.
If you have any suggestion/question, welcome to send an email to me. E-mail: kigurumi.shia@gmail.com
If you have any suggestion/question, welcome to send an email to me. E-mail: kigurumi.shia@gmail.com
🆕 What's New · v1.2.5
Provide a temporary solution for the dark mode problem. Shift Calendar will support the dark mode as soon as possible.
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Shift Calendar / Schedule
- Developer
- Lin Chih-YU
- Bundle ID
- lincyu.littlefoxstudio.Shift-Calendar
- App Store URL
- Open in App Store
- Category
- Productivity
- Content rating
- 4+
- Languages
- EN, RU, ZH, ZH
Company
- Website
- Not found
- Tagline
- Today
- Description
- Find apps and games for iPhone, iPad, Mac, and more on the App Store.
- Founded
- Not found
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- OG image
Revenue
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $12.1K/mo
- Top-grossing rank
- Outside top 100 in US Productivity
- All-time revenue
- Not found
- Pricing
- Not found
Founder
- Name
- Not found
- X / Twitter
- Not found
- Not found
- GitHub
- Not found
- X followers
- Not found
- Public statements
- Not found
Funding
- Total raised
- Not found
- Last round
- Not found
- Investors
- Not found
- Crunchbase
- Not found
- AngelList
- Not found
Press & Links
- Articles found
- Not found
- Listed on
- Not found
- Blog
- Not found
- Press / News
- Not found
Contacts & Socials
- Socials
- Not found
- Not found
- Phone
- Not found
- Contact page
- Not found
- About page
- https://apps.apple.com/us/iphone/story/id1884836200
📈Ratings growth70 ratings+6900% lifetimeShow 3-year history estimate ▾
Tracked (48 weeks) Pre-tracking estimate (37 weeks) · model-based, ±5% noise · anchored to release date and current value
🌍Geographic ReachNot ranked
This app is currently outside the top 100 grossing in all 9 countries we monitor (US, UK, DE, FR, JP, CA, AU, BR, IN). Niche or new apps often launch this way — popularity rankings appear once daily revenue clears the regional threshold.
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.
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