How much does Lumy make per month?

Based on our ML-calibrated revenue forecast, Lumy earns approximately $9.7K/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.

With estimated build cost $150K and monthly revenue $9.7K, Lumy looks break-even-grade — payback period sits around 1.3 years. Profitability also depends on paid-acquisition spend and refund rate which the public model doesn't see.

How many users does Lumy have?

Estimated audience: ~320K lifetime downloads, ~25K monthly active users, and ~5K 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 Lumy?

Browse the full Utilities 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 Lumy built with?

Our heuristic places Lumy on the Native iOS (Swift / UIKit) stack (Medium confidence, 55%). Signals: app bundle size, category context, store-description markers, release-date era. We don't disassemble binaries. Alternative possibilities: React Native, Flutter.

Is Lumy still actively maintained?

Maintenance status: Active (5% abandonment risk). Last shipped version was 10 days ago. The risk score combines time-since-last-update with Editor's Choice / curated featuring + user-base maturity adjustments.

How much would Lumy sell for?

Estimated acquisition value: $175K (marketplace range $125K – $225K). Calculated as 19× 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 Lumy last updated?

Lumy last shipped a new version on 2026-09-17 — less than a month ago. This is the date Apple / Google last accepted a new build, not a content-only push.

Lumy is published by Raja Vijayaraman 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 Lumy's BU Score?

Lumy has a BU Score of 75/100 (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.

Lumy

Quality Score

Strong

Lumy

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

by Raja Vijayaraman

Medium confidence

4.8 App Store rating

✍️ Bumetric analysis

“

Lumy is an iOS app from Raja Vijayaraman in the Utilities category, currently rated 4.8★ across 2,321 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.

Quality Score is 75: Strong (healthy traction). For a Utilities 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

$9.7K

per month

→

12-mo forecast

$10.0K – $20.9K

per month

→

24-mo forecast

$12.4K – $37.1K

per month

MID tier

💡 Grow this revenue

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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

161 snapshots on record

idle

Rating

4.8

Reviews

2,321 reviews

Forecast Revenue / mo

$9.7K

Snapshots tracked

161

since Aug 2014

ONE-TIME · BUILD 💰 Estimated build cost

$150K

↳ What it cost to build · not monthly revenue

Likely range $110K – $200K

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

📈 Pays back in ~1.3y 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 (257 MB)	+$40K
⚙ Utilities complexity ×0.85	$-13575
⚙ 12.1y maintenance × ~1-person team	+$72K

Total estimate $150K

ONE-TIME · EXIT VALUE 💵 Estimated acquisition value

$175K

↳ What it would sell for · not monthly revenue

Marketplace range $125K – $225K · 19× MRR multiple

💸 ~1.2× build cost (break-even+)

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
📅 12.1y proven track record	+20%
⭐ ★ rating ≥ 4.7 (premium)	+15%
🏷 Utilities category multiple	-10%

Final multiple 19× MRR

👥 Estimated audience size

320K

Lifetime downloads (US-equivalent)

Monthly active

25K

Daily active

5.0K

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

📲 Utilities engagement	~200 installs / rating
📅 12.1y of rating accumulation	-30%
🔁 Utilities D30 retention	20%
📍 DAU / MAU stickiness	0.20

DAU / MAU 20% sticky

🛠 Estimated tech stack

🍎

Native iOS (Swift / UIKit)

Medium confidence · 55%

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	257 MB
🏷 Category context	Utilities
📦 Large iOS bundle	→ Native Swift / UIKit (pre-2020 era) + assets

💀 Maintenance status

Active

Last shipped 2026-09-17 · 10 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

📅 10 days since last update

Active development

Verdict Active

🔬

How we forecast this revenue

MEDIUM CONFIDENCE

Baseline

$9.7K/mo · ML-estimated from 234 triggers

Growth rate

+4.0% MoM · MID tier baseline (compound monthly)

6 months

$9.2K – $15.3K

12 months

$10.0K – $20.9K

24 months

$12.4K – $37.1K

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 peers

Growth Velocity

5.0

Founder Strength

5.7

Product Quality

8.7

Revenue Strength

4.0

Monetization Maturity

1.0

Defensibility

6.0

Market Position

2.0

Operational Safety

10.0

💰 Revenue: Modest — $6K - $14K/mo · MID tier · medium confidence, trajectory unclear.
⭐ Quality: 4.81★ across 2,285 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 = $173K-$309K. Portfolio play ($52K/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

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 10 of 10 triggers

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

Paid app ($7.99)METRIC		+$2,800
Excellent rating (4.8★)METRIC		+$2,200
worth every pennyREVIEW		+$2,000
bugsREVIEW		−$1,800
5 starREVIEW		+$1,800
excellent appREVIEW		+$1,500
Low install base (2,321 ratings)METRIC		+$1,500
Mature app (12y 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)

📥 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 · v2026.2.3

Lumy is ready for OS 27.

Ask Lumy
- Ask about the sun, moon, golden hour, daylight and more in natural language. Questions are understood on device, while Lumy’s own solar engine calculates the answer.

On-screen awareness… Full release notes →

Profile & Insights

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

Identification

App name: Lumy
Developer: Raja Vijayaraman
Bundle ID: com.appatakkars.lumy
App Store URL: Open in App Store
Category: Utilities
Content rating: 4+
Languages: EN, FR, DE, JA, ZH

Company

Website: lumy.app
Tagline: Lumy for iOS, iPadOS, watchOS, and tvOS
Description: Lumy is a simple and beautiful app for photographers and everyone who wants to track the sun and moon.
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: $9.7K/mo
Top-grossing rank: Outside top 100 in US Utilities
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 growth2,293 ratings+667% lifetimeShow 3-year history estimate ▾

Tracked (60 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.

💰Pricing History$0.00 → $7.99 (+0%)

🚀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

Lumy is a modern sun tracker + outdoor activity planner.

- Perfect lighting for photos or videos? Done.
- Sunrise hike or sunset walk? Easy.
- Outdoor yoga or sunlight breaks? Covered.

Whether you’re chasing golden hour* or keeping an eye on moon phases for a night under the stars, Lumy helps you make the most of natural light.

Now redesigned from the ground up - Lumy feels more personal, purposeful, and in sync with how we live. 

Introducing Modes: Switch between profiles like Daily, Photography, or Meditation to shape Lumy around your routine. See only what matters to you.… View full description on the official store →

App Specs

🔐 Own this app? Claim & verify MRR →

💾 257 MB🔞 4+📱 iOS 18.0+🔖 v2026.2.3🔄 updated 1w ago🌐 EN, FR, DE, JA, ZH📂 Utilities💰 Paid🚀 Launched 2014 (12y old)

📅

What Worked™ · Development Pipeline

15 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 →

2026-06

💲

Price ↑ $6.99 → $7.99 (+14%)

→ 30 days after: reviews +27 high confidence

2026-06

🔧

Shipped update — v2026.1.16 → v2026.1.17

→ 30 days after: reviews +36 medium · co-occurring

2026-05

🔧

Shipped update — v2026.1.15 → v2026.1.16

→ 30 days after: reviews +30 medium · co-occurring

2026-05

🔧

Shipped update — v2026.1.14 → v2026.1.15

→ 30 days after: reviews +44 medium · co-occurring

2026-05

💲

Went paid — introduced $6.99 price point

→ 30 days after: reviews +36 high confidence

2026-03

⭐

Rating ↑ 4.35 → 4.80 (improved 0.45★)

→ 30 days after: revenue +$25.9K/mo · rating +0.45★ · reviews +1,795 high confidence

2026-03

📈

Crossed 500 ratings — social-proof flywheel kicking in

→ 30 days after: revenue +$25.9K/mo · rating +0.45★ · reviews +1,795 high confidence

2021-10

📈

Crossed 100 ratings — social-proof flywheel kicking in

2021-10

📈

Crossed 100 ratings — social-proof flywheel kicking in

→ 30 days after: revenue +$194/mo · reviews +14 medium · co-occurring

2020-10

📈

Crossed 50 ratings — social-proof flywheel kicking in

→ 30 days after: revenue +$58/mo high confidence

2020-10

📈

Crossed 50 ratings — social-proof flywheel kicking in

→ 30 days after: revenue +$230/mo · rating +0.16★ · reviews +16 high confidence

2016-03

📈

Crossed 10 ratings — social-proof flywheel kicking in

→ 30 days after: rating +0.10★ medium · co-occurring

2015-03

⭐

Rating ↓ 4.75 → 4.00 (dropped 0.75★)

→ 30 days after: rating +0.29★ medium · co-occurring

2014-09

⭐

Rating ↑ 4.00 → 4.50 (improved 0.50★)

→ 30 days after: rating +0.50★ high confidence

2014-08

🚀

First tracked snapshot — initial data captured

→ 30 days after: rating +0.50★ high confidence

🌍

Multi-Country Performance

Available in 9 of 9 monitored markets

Market	Rating	Reviews	Current version
🇦🇺 AU	4.80531★	113	4.80531★ this version
🇧🇷 BR	4.35714★	56	4.35714★ this version
🇨🇦 CA	4.77142★	210	4.77142★ this version
🇩🇪 DE	4.80422★	521	4.80422★ this version
🇫🇷 FR	4.7415★	147	4.7415★ this version
🇬🇧 GB	4.76105★	339	4.76105★ this version
🇮🇳 IN	4.64286★	182	4.64286★ this version
🇯🇵 JP	4.71865★	327	4.71865★ this version
🇺🇸 US	4.8143★	2,321	4.8143★ this version

🔔

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📝 Description

BU Score · Transcendent

Full revenue analysis

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

Read deep-dive →