Easy Calendar
74
Quality Score
Strong
Easy Calendar
Medium confidence
✍️ bumetric analysis
“
Easy Calendar is an iOS app from Tom van Zummeren in the Productivity category, currently rated 4.7★ across 2,581 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Quality Score is 74: Strong (healthy traction). For a Productivity app, that means healthy traction. The full BU Investment Matrix below scores 8 dimensions including monetisation, growth, and operational risk.
Track changes month-over-month in the Performance section below: live snapshot history and revenue forecast included.
💰 Monthly revenue · now vs forecast
● Right now
$10.4K
per month
→
12-mo forecast
$10.8K – $22.6K
per month
→
24-mo forecast
$13.4K – $40.1K
per month
MID tier
💡 Grow this revenue
Free AI audit of this app’s store listing
- Title & subtitle keyword fit
- Description hook & conversion structure
- Screenshots, ratings, reviews strategy
Typical impact: +2-5× organic installs
📊 Performance Tracking LIVE
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Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
ONE-TIME · BUILD
💰 Estimated build cost
$55K
↳ What it cost to build · not monthly revenue
Likely range $40K – $75K
$25K · MVP floor
$100K · indie scale
$500K+ · studio build
📈
Pays back in ~2 months at current MRR
Synthetic estimate. Inputs: category complexity, file size, screen count, monetization layer, platform reach, age × team-size proxy. Calibrated against 2024-2026 indie-agency rate surveys. Full math + source list on /methodology.
Where the money goes
| 🧱 MVP baseline (design + 1-store ship) | +$28K |
| 📱 5 unique screens × $4.5K | +$22K |
| ⚙ Productivity complexity ×1.10 | +$5K |
Total estimate
$55K
ONE-TIME · EXIT VALUE
💵 Estimated acquisition value
$600K
↳ What it would sell for · not monthly revenue
Marketplace range $425K – $700K · 19× MRR multiple
💸
~11× return on build cost
Synthetic estimate. Multiple band derived from ad-supported + age, rating quality, category demand, and user-base maturity. Calibrated against 2024-2026 indie-app-marketplace closed-deal medians. Full math + comparable deal list on /methodology.
How the multiple was built
| 📺 Ad-supported base | 15× MRR |
| ⭐ ★ rating ≥ 4.7 (premium) | +15% |
| 🏷 Productivity category multiple | +8% |
Final multiple
19× MRR
👥 Estimated audience size
190K
Lifetime downloads (US-equivalent)
Monthly active
57K
Daily active
25K
Synthetic estimate from ratings × category benchmarks. Calibrated against 2024-2026 mobile-attribution retention + DAU/MAU reports. Numbers are US-storefront-equivalent — true global audience can be 5-10× larger for international apps. Full math + source list on /methodology.
How we sized it
| 📲 Productivity engagement | ~75 installs / rating |
| 🔁 Productivity D30 retention | 30% |
| 📍 DAU / MAU stickiness | 0.45 |
DAU / MAU
45% sticky
🔬
How we forecast this revenue
MEDIUM CONFIDENCEBaseline
$10.4K/mo · ML-estimated from 234 triggers
Growth rate
+4.0% MoM · MID tier baseline (compound monthly)
6 months
$9.9K – $16.5K
12 months
$10.8K – $22.6K
24 months
$13.4K – $40.1K
Compound growth at +4.0% MoM (tier baseline for MID). Range widens with horizon — typical noise band ±25% at 6mo.. Ranges widen with horizon — distant futures carry more uncertainty.
📊
BU Investment Matrix
Below median · 53/100MID TIERunderperforming peersGrowth Velocity
5.0
Founder Strength
5.5
Product Quality
8.5
Revenue Strength
4.0
Monetization Maturity
1.0
Defensibility
6.0
Market Position
2.0
Operational Safety
10.0
- 💰 Revenue: Modest — $7K - $15K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.74★ across 2,581 reviews — strong (top 10%).
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: Insufficient signal to assess trajectory.
- ⚠️ Risk: Low — no material risk signals detected.
🎯 For competitors: Mixed picture. Worth competing if you have a clear UX or pricing edge — otherwise crowded segment.
💵 For acquirers: Estimated asking range 18-32× monthly = $187K-$334K. Portfolio play ($29K/mo combined) commands premium.
Composite of 8 dimensions computed deterministically from public signals — no LLM, every score traces back to a measurable input. Default weights shown; "compete" / "acquire" / "invest" lenses re-weight without re-fetching.
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 10 of 10 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 (4.7★)METRIC | +$2,200 | |
| worth every pennyREVIEW | +$2,000 | |
| bugsREVIEW | −$1,800 | |
| 5 starREVIEW | +$1,800 | |
| excellent appREVIEW | +$1,500 | |
| Low install base (2,581 ratings)METRIC | +$1,500 | |
| Mature app (15y old)METRIC | +$1,500 | |
| highly recommendREVIEW | +$1,400 | |
| Localized (5 languages)METRIC | +$600 |
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.
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Easy Calendar
- Developer
- Tom van Zummeren
- Bundle ID
- com.tomvanzummeren.EasyCalendar
- App Store URL
- Open in App Store
- Category
- Productivity
- Content rating
- 4+
- Languages
- NL, EN, FR, DE, ES
Company
- Website
- www.easy-calendar.com
- Tagline
- Easy Calendar
- Description
- Experience the ease of use of a weekly calendar in the palm of your hand! Designed around frequent tasks, Easy Calendar lets you create and edit events with just a few taps.
- Founded
- Not found
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- Available
Revenue
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $29.7K/mo
- Top-grossing rank
- Outside top 100 in US Productivity
- All-time revenue
- Not found
- Pricing
- Not found
Founder
Founder data not yet collected for this app.
Funding
Funding data not yet collected for this app.
Press & Links
Press & Links data not yet collected for this app.
Contacts & Socials
Contacts & Socials data not yet collected for this app.
📈Ratings growth2,581 ratings+483% lifetimeShow 3-year history estimate ▾
Tracked (59 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.
💰Pricing History$0.00 → $1.99 (+0%)
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.
📝 About this app
Experience the ease of use of a weekly calendar in the palm of your hand! Designed around frequent tasks, Easy Calendar lets you create and edit events with just a few taps.
Automatically syncs with your current calendar.
Features
• Perfect overview of the week
• 100% integration with native iPhone calendar events
• Synchronization with iCloud, Outlook, Google Calendar, Hotmail and other CalDAV calendars using the native iPhone
features
• Rotate your device to switch between one week and a three weeks view
• Month view for long-term planning and to quickly jump to another week… View full description on the official store →
Automatically syncs with your current calendar.
Features
• Perfect overview of the week
• 100% integration with native iPhone calendar events
• Synchronization with iCloud, Outlook, Google Calendar, Hotmail and other CalDAV calendars using the native iPhone
features
• Rotate your device to switch between one week and a three weeks view
• Month view for long-term planning and to quickly jump to another week… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →💾 46 MB🔞 4+📱 iOS 15.6+🔖 v4.10.17🔄 updated 0d ago🌐 NL, EN, FR, DE, ES📂 Productivity💰 Paid
📅
What Worked™ · Development Pipeline
10 EVENTS TRACKEDDetected changes in this app over its tracked lifetime — each event links cause (what changed) to effect (what moved). Sorted newest first.See full history →Version history →
2026-05
💲
Went paid — introduced $1.99 price point
2026-03
📈
Crossed 1,000 ratings — social-proof flywheel kicking in
2026-03
📈
Crossed 500 ratings — social-proof flywheel kicking in
2013-07
📈
Crossed 100 ratings — social-proof flywheel kicking in
2013-05
📈
Crossed 50 ratings — social-proof flywheel kicking in
2013-02
📈
Crossed 10 ratings — social-proof flywheel kicking in
2013-02
⭐
Rating ↓ 4.33 → 4.00 (dropped 0.33★)
2013-02
⭐
Rating ↓ 4.50 → 3.67 (dropped 0.83★)
2013-02
🚀
First tracked snapshot — initial data captured
2013-02
⭐
Rating ↓ 5.00 → 4.50 (dropped 0.50★)
🌍
Multi-Country Performance
Available in 9 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇦🇺 AU | 4.76412★ | 301 | 4.76412★ this version |
| 🇧🇷 BR | 4.92157★ | 51 | 4.92157★ this version |
| 🇨🇦 CA | 4.68214★ | 280 | 4.68214★ this version |
| 🇩🇪 DE | 4.65815★ | 3,566 | 4.65815★ this version |
| 🇫🇷 FR | 4.61568★ | 2,909 | 4.61568★ this version |
| 🇬🇧 GB | 4.76241★ | 926 | 4.76241★ this version |
| 🇮🇳 IN | 4.84615★ | 13 | 4.84615★ this version |
| 🇯🇵 JP | 4.66667★ | 21 | 4.66667★ this version |
| 🇺🇸 US | 4.74526★ | 2,587 | 4.74526★ this version |
🔔
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📝 Description
95
BU Score · Transcendent
Full revenue analysis
Read the article-style breakdown for Easy Calendar: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
More by Tom van Zummeren
View all →📦 Portfolio summaryINDIE studio
2apps·$29K/mocombined
⚠ Concentrated — top app contributes 100% of combined revenue (single-app dependency)
Similar apps in Productivity
About this analysis
Why medium confidence: 2,581 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
4 answers · auto-generated from this app's public dataHow much does Easy Calendar make per month?▴
Based on our ML-calibrated revenue forecast, Easy Calendar earns approximately $29K/mo. This is a US-storefront-equivalent estimate; global revenue can be several times larger for internationally-distributed apps. See the methodology page for the full formula and confidence bands.
What apps are like Easy Calendar?▴
Browse the full Productivity category catalog to find similar apps with revenue, build cost, audience and tech stack data. Each /p/{slug} page also shows a Compare side-by-side widget with three peer apps from the same niche.
Who makes Easy Calendar?▴
Easy Calendar is published by Tom van Zummeren on the Apple App Store. See the full publisher portfolio (other apps by the same developer) via the More by developer block on the product page above.
What is Easy Calendar's BU Score?▴
Easy Calendar has a BU Score of 74/100 (Strong). The score combines App Store rating, ratings count, monetization model and revenue signals calibrated against founder-verified MRR anchors. See the BU Score formula.