How much does Simple Working Calendar make per month?

Based on our ML-calibrated revenue forecast, Simple Working Calendar earns approximately $5.0K/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.

Is Simple Working Calendar profitable?

With estimated build cost $140K and monthly revenue $5.0K, Simple Working Calendar looks break-even-grade — payback period sits around 2.3 years. Profitability also depends on paid-acquisition spend and refund rate which the public model doesn't see.

How many users does Simple Working Calendar have?

Estimated audience: ~6K lifetime downloads, ~1K monthly active users, and ~630 daily active users. Derived from ratings count × category installs-per-rating × age decay. US-storefront-equivalent — global audience can be 5-10× larger for internationally-distributed apps.

What apps are like Simple Working 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.

What is Simple Working Calendar built with?

Our heuristic places Simple Working Calendar on the Native iOS (Swift / UIKit) stack (Medium confidence, 60%). Signals: app bundle size, category context, store-description markers, release-date era. We don't disassemble binaries. Alternative possibilities: React Native, Flutter.

Is Simple Working Calendar still actively maintained?

Maintenance status: Slowing (25% abandonment risk). Last shipped version was 1 months ago. The risk score combines time-since-last-update with Editor's Choice / curated featuring + user-base maturity adjustments.

How much would Simple Working Calendar sell for?

Estimated acquisition value: $100K (marketplace range $75K – $125K). Calculated as 21× monthly revenue using the standard multiple for the detected monetization model + adjustments for age, rating quality and category demand. Calibrated against 2024-2026 Flippa / Acquire.com / MicroAcquire closed-deal medians.

When was Simple Working Calendar last updated?

Simple Working Calendar last shipped a new version on 2026-08-24 — 1 months ago. This is the date Apple / Google last accepted a new build, not a content-only push.

Who makes Simple Working Calendar?

Simple Working Calendar is published by Нико Беллик 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 Simple Working Calendar's BU Score?

Simple Working Calendar has a BU Score of 59/100 (Solid). The score combines App Store rating, ratings count, monetization model and revenue signals calibrated against founder-verified MRR anchors. See the BU Score formula.

Simple Working Calendar

Quality Score

Solid

Simple Working Calendar

Name: Simple Working Calendar — app revenue, audience, build cost & risk profile
Creator: Bumetric
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Simple Working Calendar revenue, Simple Working Calendar app analytics, mobile app revenue estimate, Productivity revenue, iOS app revenue

by Нико Беллик

Medium confidence

4.8 App Store rating

✍️ Bumetric analysis

“

Simple Working Calendar is an iOS app from Нико Беллик in the Productivity category, currently rated 4.8★ across 131 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.

Quality Score is 59: Solid (established niche player). For a Productivity app, that means established niche player. 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

$539

per month

→

12-mo forecast

$472 – $1701

per month

→

24-mo forecast

$437 – $3934

per month

INDIE tier

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Title & subtitle keyword fit
Description hook & conversion structure
Screenshots, ratings, reviews strategy

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Typical impact: +2-5× organic installs

📊 Performance Tracking LIVE

8 snapshots on record

idle

Rating

4.8

Reviews

131 reviews

Forecast Revenue / mo

$5.0K

Snapshots tracked

since Mar 2020

ONE-TIME · BUILD 💰 Estimated build cost

$140K

↳ What it cost to build · not monthly revenue

Likely range $105K – $190K

$25K · MVP floor $100K · indie scale $500K+ · studio build

📈 Pays back in ~2.3y 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
📦 Asset bundle (179 MB)	+$40K
⚙ Productivity complexity ×1.10	+$9K
⚙ 6.8y maintenance × ~1-person team	+$40K

Total estimate $140K

ONE-TIME · EXIT VALUE 💵 Estimated acquisition value

$100K

↳ What it would sell for · not monthly revenue

Marketplace range $75K – $125K · 21× MRR multiple

💸 ~0.7× build cost (under-water)

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
📅 6.8y proven track record	+20%
⭐ ★ rating ≥ 4.7 (premium)	+15%
🏷 Productivity category multiple	+8%
⭐ Small user base (<1K ratings)	-8%

Final multiple 21× MRR

👥 Estimated audience size

6.8K

Lifetime downloads (US-equivalent)

Monthly active

1.4K

Daily active

630

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
📅 6.8y of rating accumulation	-30%
🔁 Productivity D30 retention	30%
📍 DAU / MAU stickiness	0.45

DAU / MAU 45% sticky

🛠 Estimated tech stack

🍎

Native iOS (Swift / UIKit)

Medium confidence · 60%

Also possible

React Native Flutter

Heuristic guess from app bundle size, category, store description signals, and release-date stack era. Bumetric does not disassemble binaries — for binary-level certainty you would need an SDK intelligence tool or the manifest itself. Reasoning chain on the right. Full ruleset on /methodology.

Signals we read

📦 App bundle size	179 MB
🏷 Category context	Productivity
📦 Mid-large iOS bundle	→ Likely native Swift / UIKit (pre-2020 era)

💀 Maintenance status

Slowing

25%

Last shipped 2026-08-24 · 36 days ago

0 · Active 50 · At risk 100 · Abandoned

Heuristic risk score from time-since-last-update + ratings velocity proxy + Editor's Choice / curated featuring signals. Calibrated against 2024-2025 app-store ranking decay reports. Not a guarantee — a quiet app with a healthy codebase looks the same as an abandoned one until something breaks. Full math on /methodology.

Risk signals

📅 36 days since last update	Healthy release cadence
👥 Small user base (131 ratings) + 6.8y old	+10% (solo-project pattern)

Verdict Slowing

🔬

How we forecast this revenue

LOW CONFIDENCE

Baseline

$539/mo · ML-estimated from 234 triggers

Growth rate

+6.0% MoM · INDIE tier baseline (compound monthly)

6 months

$459 – $1.1K

12 months

$472 – $1.7K

24 months

$437 – $3.9K

Compound growth at +6.0% MoM (tier baseline for INDIE). Range widens with horizon — typical noise band ±40% at 6mo.. Ranges widen with horizon — distant futures carry more uncertainty.

📊

BU Investment Matrix

Early-stage solo · 40/100INDIE TIERexpected for tier

Revenue Strength

2.7

Product Quality

6.8

Market Position

0.0

Growth Velocity

5.0

Defensibility

3.7

Operational Safety

10.0

Founder Strength

2.9

Monetization Maturity

1.0

💰 Revenue: Marginal — $215 - $1349/mo · INDIE tier · medium confidence, trajectory unclear.
⭐ Quality: 4.84★ across 131 reviews — solid.
📍 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 = $9K-$17K.

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

MODEL

Revenue 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 4 of 4 triggers

Our ML model uses 200+ signals from public data. These are the most influential for this app:

Excellent rating (4.8★)METRIC		+$2,200
Established app (6y old)METRIC		+$800
Ad-supported / freemiumMETRIC		+$600
Early-stage install base (131 ratings)METRIC		+$400

METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)

📥 Estimated Downloads / week

PROXY · ratings × 50/wk —

Industry-rule estimate (Sensor Tower / data.ai): one weekly install ≈ 50 new ratings. Solid points = tracked snapshots · faded line = pre-tracking model backfill.

📈 Reviews Growth

LIVE

Cumulative review count from first BU snapshot. Each point = a tracked update.

⭐ Rating Trend

LIVE

Average rating evolution. Updates with each new review batch.

🗓️ Snapshot Timeline

HISTORY

Each bar shows a tracked update and the metric delta from the previous snapshot.

🆕 What's New · v2.1.0

Technical update: refreshed internal components, improved stability and performance, minor fixes. Your schedules and shifts are safe and work as before.

Profile & Insights

Everything we know — and don't — about this app and its company.

Identification

App name: Simple Working Calendar
Developer: Нико Беллик
Bundle ID: com.wudid.WorkCalendar
App Store URL: Open in App Store
Category: Productivity
Content rating: 12+
Languages: EN, RU, 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: Available

Revenue

Reported revenue signal / mo: Not found
AI revenue estimate / mo: Not found
AI annual estimate: Not found
Model estimate / mo: $5.0K/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 growth178 ratings+17700% lifetimeShow 3-year history estimate ▾

Tracked (8 weeks) Pre-tracking estimate (0 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.

🚀Update Frequency · Releases per Quarter4 releases tracked

🚀Version Release Timeline4 releases tracked

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

Simple Work Calendar — your shift schedule in two taps. Pick a cycle, mark your first working day — the calendar computes all shifts and days off years ahead.

ANY SCHEDULE
• Ready cycles: 2/2, 3/3, 1 on / 3 off
• Custom patterns: any mix of working and off days — 5/2, 4/2, 6/1, 15/15 rotations
• Anchor the rotation to any start date — today, tomorrow or a day in the past

NIGHT SHIFTS
• Mark which shifts in the cycle are nights — shown in dark
• Tap any day to switch: day → night → off
• Manual edits never break the pattern

COUNTERS… View full description on the official store →

App Specs

🔐 Own this app? Claim & verify MRR →

💾 179 MB🔞 12+📱 iOS 15.0+🔖 v2.1.0🔄 updated 1mo ago🌐 EN, RU, ZH📂 Productivity💰 Paid🚀 Launched 2019 (6y old)

📅

What Worked™ · Development Pipeline

9 EVENTS TRACKED

Detected 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 →

2026-09

📦

Bundle ↑ 141MB → 188MB — likely major code refresh

2026-08

🔧

Shipped update — v2.0.1 → v2.1.0

→ 30 days after: reviews +11 high confidence

2026-08

🔧

Shipped update — v2.0 → v2.0.1

→ 30 days after: reviews +12 high confidence

2026-06

🔧

Shipped update — v1.8.6 → v2.0

→ 30 days after: reviews +14 high confidence

2026-05

🔄

Monetization changed: freemium → free

→ 30 days after: reviews +10 high confidence

2026-03

⭐

Rating ↑ 3.00 → 4.80 (improved 1.80★)

2026-03

📈

Crossed 10 ratings — social-proof flywheel kicking in

2025-07

⭐

Rating ↓ 4.00 → 3.00 (dropped 1.00★)

2020-03

🚀

First tracked snapshot — initial data captured

🔔

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📝 Description

BU Score · Transcendent

Full revenue analysis

Read the article-style breakdown for Simple Working Calendar: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.

Read deep-dive →