63
BU Score
Solid
Calendar Tools (Kalender)
✍️ BU Analytics Review
“
Calendar Tools (Kalender) is an iOS app from Shan Shan Liu in the Business category, currently rated 4.9★ across 8 ratings. Initial signal reads as mostly critical sentiment so far — users flag rough edges and unmet expectations.
Our BU Score puts it at 63 — Solid (established niche player). For a Business 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 6 of 6 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Paid app ($0.00)METRIC | +$2,800 | |
| Excellent rating (4.9★)METRIC | +$2,200 | |
| 5 starREVIEW | +$1,800 | |
| Mature app (14y old)METRIC | +$1,500 | |
| Localized (8 languages)METRIC | +$600 | |
| Pre-traction phase (8 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.
⭐ 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 →💾 16 MB🔞 4+📱 iOS 13.0+🔖 v2.5🔄 updated 2y ago🌐 NL, EN, FR, DE, JA +3📂 Business💰 Paid🚀 Launched 2011 (14y old)
📝 About this app
Calendar Tools – A Supplement (Not A Replacement) To iPhone Calendar
Calendar Tools gives you an easy way to modify your calendar events with customized repeat rules and alerts.
Feature List:
Share ics/text events
Create customized alerts
For example:
Set alarm at May 26, 2011, 9:21 AM,
Set alarm 1 Day 6 Hours 20 Minutes Before,
Set alarm 2 Minutes Before
Utilize iPhone’s built-in Calendar alarm, no internet needed.
Quickly delete multiple events
Create new events
Support Copy / Paste / Move events
Calendar Filter: filter events by time period
Show days-until
Sort events by alphabetical order or time
Support iPhone, iPod Touch and iPad
Sync with the iPhone Calendar. Events will be saved and viewable in iPhone's Calendar.
Works with all calendars that use the iPhone Calendar.
***
Detailed User guide with more screenshots is available on the web site www.appiplayer.com
Please send us emails at support@appiplayer.com if you have any questions or comments. We listen to you and support you. We will keep on updating.
Calendar Tools gives you an easy way to modify your calendar events with customized repeat rules and alerts.
Feature List:
Share ics/text events
Create customized alerts
For example:
Set alarm at May 26, 2011, 9:21 AM,
Set alarm 1 Day 6 Hours 20 Minutes Before,
Set alarm 2 Minutes Before
Utilize iPhone’s built-in Calendar alarm, no internet needed.
Quickly delete multiple events
Create new events
Support Copy / Paste / Move events
Calendar Filter: filter events by time period
Show days-until
Sort events by alphabetical order or time
Support iPhone, iPod Touch and iPad
Sync with the iPhone Calendar. Events will be saved and viewable in iPhone's Calendar.
Works with all calendars that use the iPhone Calendar.
***
Detailed User guide with more screenshots is available on the web site www.appiplayer.com
Please send us emails at support@appiplayer.com if you have any questions or comments. We listen to you and support you. We will keep on updating.
🆕 What's New · v2.5
iOS 17 compatibility fixes and performance improvements
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Calendar Tools (Kalender)
- Developer
- Shan Shan Liu
- Bundle ID
- com.liushanshan.CalendarTools
- App Store URL
- Open in App Store
- Category
- Business
- Content rating
- 4+
- Languages
- NL, EN, FR, DE, JA, RU, ZH, ES
Company
- Website
- appiplayer.com
- Tagline
- A mobile app developer
- Description
- Not found
- Founded
- Not found
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- Not found
Revenue
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $10.4K/mo
- Top-grossing rank
- Outside top 100 in US Business
- 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
- http://appiplayer.com/contact
- About page
- Not found
📈Ratings growth8 ratings+700% lifetimeShow 3-year history estimate ▾
Tracked (24 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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