How much does Lumo by Proton make per month?

Based on our ML-calibrated revenue forecast, Lumo by Proton earns approximately $1.3K/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 Lumo by Proton?

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 Lumo by Proton?

Lumo by Proton is published by Proton AG 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 Lumo by Proton's BU Score?

Lumo by Proton has a BU Score of 56/100 (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.

Lumo by Proton

Quality Score

Solid

Lumo by Proton

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

Medium confidence

3.8 ✍️ Editor

✍️ bumetric analysis

“

Lumo by Proton is an iOS app from Proton AG in the Productivity category, currently rated 3.8★ across 409 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.

Quality Score is 56: 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

$5.0K

per month

→

12-mo forecast

$5.2K – $10.8K

per month

→

24-mo forecast

$6.4K – $19.2K

per month

MID 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

Loading…

idle

Rating

—

Reviews

—

Forecast Revenue / mo

—

Snapshots tracked

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 ~3.6y 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

$20K

↳ What it would sell for · not monthly revenue

Marketplace range $15K – $25K · 14× MRR multiple

💸 ~0.4× 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
⭐ ★ rating 3.5-4.0 (mixed)	-8%
🏷 Productivity category multiple	+8%
⭐ Small user base (<1K ratings)	-8%

Final multiple 14× MRR

👥 Estimated audience size

30K

Lifetime downloads (US-equivalent)

Monthly active

9.1K

Daily active

4.0K

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

📲 Productivity engagement	~75 installs / rating
🔁 Productivity D30 retention	30%
📍 DAU / MAU stickiness	0.45

DAU / MAU 44% sticky

🔬

How we forecast this revenue

MEDIUM CONFIDENCE

Baseline

$5.0K/mo · ML-estimated from 234 triggers

Growth rate

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

6 months

$4.7K – $7.9K

12 months

$5.2K – $10.8K

24 months

$6.4K – $19.2K

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 · 50/100MID TIERunderperforming peers

Growth Velocity

5.0

Founder Strength

7.6

Product Quality

5.3

Revenue Strength

3.7

Monetization Maturity

1.0

Defensibility

5.2

Market Position

2.0

Operational Safety

10.0

💰 Revenue: Modest — $3K - $7K/mo · MID tier · medium confidence, trajectory unclear.
⭐ Quality: 3.8★ across 409 reviews — below category median.
📍 Market: Not yet charting in any of the 9 monitored markets.
📈 Growth: dev shipping weekly.
⚠️ 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 = $90K-$160K. Portfolio play ($123K/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 8 of 8 triggers

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

bugsREVIEW		−$1,800
5 starREVIEW		+$1,800
Multilingual (11 languages)METRIC		+$1,500
highly recommendREVIEW		+$1,400
slowREVIEW		−$1,200
New app (10 months old)METRIC		−$700
Ad-supported / freemiumMETRIC		+$600
Early-stage install base (409 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 · v1.5.0

Purr-fected Edit Mode - Editing a message now uses the native composer, just like writing a new one. No more juggling two inputs, one clean, familiar place to make your changes!

Profile & Insights

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

Identification

App name: Lumo by Proton
Developer: Proton AG
Bundle ID: me.proton.lumo
App Store URL: Open in App Store
Category: Productivity
Content rating: 4+
Languages: CS, NL, EN, FR, DE, IT, PL, PT, RU, ES, TR

Company

Website: Not found
Tagline: Hey, I'm Lumo
Description: Meet Lumo, the zero-access encrypted AI assistant by Proton that does not track or record your conversations. Ask me anything — it's confidential
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: $1.3K/mo
Top-grossing rank: 🇮🇳#90 /100
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 growth409 ratings+1536% lifetimeShow 3-year history estimate ▾

Tracked (49 weeks) Pre-tracking estimate (12 weeks) · model-based, ±5% noise · anchored to release date and current value

🗺️Geographic Distribution1 of 9 markets

🇮🇳

Top-grossing rank: #90 / 100

Other markets

Outside top 100
in US, GB, DE, FR, JP, CA, AU, BR, IN

This app currently ranks in only one of the 9 markets we monitor. Niche or regional apps often launch this way before global rollout. Rankings update daily.

📊Category Rank Trajectory#90 now · best #88 · worst #100

Lower line = better rank · Estimate from ratings growth model · Lower position on chart = worse rank · Higher = top of chart

🚀Version Release Timeline2 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

Meet Lumo, the privacy-first AI assistant created by Proton, the team behind encrypted email, VPN, password manager, and cloud storage trusted by over 100 million people. 

Lumo helps you stay productive, curious, and informed — without ever compromising your privacy. 

For more information visit our website: https://lumo.proton.me/about
Terms of service: https://lumo.proton.me/legal/terms
Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Our open-source code base: https://github.com/ProtonLumo/ios-lumo

App Specs

🔐 Own this app? Claim & verify MRR →

💾 38 MB🔞 4+📱 iOS 17.6+🔖 v1.5.0🔄 updated 0d ago🌐 CS, NL, EN, FR, DE +6📂 Productivity💰 Paid

📅

What Worked™ · Development Pipeline

10 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 →

2026-05

⭐

Rating ↑ 3.08 → 3.80 (improved 0.72★)

2026-03

⭐

Rating ↓ 4.00 → 3.05 (dropped 0.95★)

2026-03

⭐

Rating ↑ 3.06 → 4.00 (improved 0.94★)

2025-10

📈

Crossed 100 ratings — social-proof flywheel kicking in

2025-08

📈

Crossed 50 ratings — social-proof flywheel kicking in

2025-07

📈

Crossed 10 ratings — social-proof flywheel kicking in

2025-07

⭐

Rating ↑ 2.25 → 2.60 (improved 0.35★)

2025-07

⭐

Rating ↓ 2.67 → 2.25 (dropped 0.42★)

2025-07

🚀

First tracked snapshot — initial data captured

2025-07

⭐

Rating ↓ 3.00 → 2.67 (dropped 0.33★)

🌍

Multi-Country Performance

Available in 9 of 9 monitored markets

Market	Rating	Reviews	Current version
🇦🇺 AU	3.7931★	29	3.7931★ this version
🇧🇷 BR	3.91304★	23	3.91304★ this version
🇨🇦 CA	3.71186★	59	3.71186★ this version
🇩🇪 DE	4.04828★	145	4.04828★ this version
🇫🇷 FR	4.4★	55	4.4★ this version
🇬🇧 GB	3.31579★	76	3.31579★ this version
🇮🇳 IN	3.92857★	14	3.92857★ this version
🇯🇵 JP	3.82143★	28	3.82143★ this version
🇺🇸 US	3.8169★	426	3.8169★ this version

🔔

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📝 Description

BU Score · Transcendent

Full revenue analysis

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

Read deep-dive →