How much does My Secret Diary with Lock make per month?

Based on our ML-calibrated revenue forecast, My Secret Diary with Lock earns approximately $3.3K/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 My Secret Diary with Lock?

Browse the full Lifestyle 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 My Secret Diary with Lock?

My Secret Diary with Lock is published by Firehawk on the Google Play 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 My Secret Diary with Lock's BU Score?

My Secret Diary with Lock has a BU Score of 80/100 (Excellent). The score combines App Store rating, ratings count, monetization model and revenue signals calibrated against founder-verified MRR anchors. See the BU Score formula.

My Secret Diary with Lock

Quality Score

Excellent

My Secret Diary with Lock

Name: My Secret Diary with Lock — app revenue, audience, build cost & risk profile
Creator: bumetric
License: https://creativecommons.org/licenses/by/4.0/
Keywords: My Secret Diary with Lock revenue, My Secret Diary with Lock app analytics, mobile app revenue estimate, Lifestyle revenue, Android app revenue

High confidence

4.8 ✍️ Editor

✍️ bumetric analysis

“

My Secret Diary with Lock is an Android app from Firehawk in the Lifestyle category, currently rated 4.8★ across 296,928 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.

Quality Score is 80: Excellent (strong product-market fit). For a Lifestyle app, that means strong product-market fit. 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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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

$80K

↳ What it cost to build · not monthly revenue

Likely range $60K – $110K

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

📈 Pays back in ~2.0y 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
⚙ Lifestyle complexity ×1.05	+$2K
🌐 Cross-platform reach (iOS + Android)	+$29K

Total estimate $80K

ONE-TIME · EXIT VALUE 💵 Estimated acquisition value

$50K

↳ What it would sell for · not monthly revenue

Marketplace range $45K – $75K · 18× MRR multiple

💸 ~0.6× 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 ≥ 4.7 (premium)	+15%
⭐ Mature user base (100K+ ratings)	+5%

Final multiple 18× MRR

👥 Estimated audience size

32.5M

Lifetime downloads (US-equivalent)

Monthly active

4.2M

Daily active

840K

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

📲 Lifestyle engagement	~110 installs / rating
🔁 Lifestyle D30 retention	13%
📍 DAU / MAU stickiness	0.20

DAU / MAU 20% sticky

🛠 Estimated tech stack

🤖

Native Android (Kotlin)

High confidence · 80%

Also possible

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

🏷 Category context	Lifestyle
📦 Compact Android bundle	→ Native Kotlin

🔬

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 · 51/100MID TIERunderperforming peers

Growth Velocity

5.0

Founder Strength

7.2

Product Quality

9.6

Revenue Strength

3.7

Monetization Maturity

1.0

Defensibility

5.0

Market Position

0.0

Operational Safety

9.0

💰 Revenue: Modest — $3K - $7K/mo · MID tier · medium confidence, trajectory unclear.
⭐ Quality: 4.81★ across 296,928 reviews — exceptional (top 1% in category).
📍 Market: Not yet charting in any of the 9 monitored markets.
📈 Growth: last update 253d ago — slow cadence.
⚠️ 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 ($55K/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 3 of 3 triggers

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

High install base (296,928 ratings)METRIC		+$12,000
Excellent rating (4.8★)METRIC		+$2,200
Ad-supported / freemiumMETRIC		+$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.

Profile & Insights

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

Identification

App name: My Secret Diary with Lock
Developer: Firehawk
Bundle ID: com.tsua.my.secret.diary.lock.photo
App Store URL: Open in App Store
Category: Lifestyle
Content rating: Not found
Languages: Not found

Company

Website: Not found
Tagline: Not found
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: $3.3K/mo
Top-grossing rank: Not found
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.

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

My Diary Online Journal!

<h1>Private Journal Diary - A Personal Journaling Friend!</h1>

Welcome to Private Journal Diary, the ultimate personal diary journal to turn your daily online journaling into a beautiful experience. Enjoy this online personal journal the right way!📖

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My Diary With Fingerprint Lock allows you to navigate through the easy-to-use main screen calendar to make unlimited entries effortlessly. Whether you want to capture your thoughts or events or record your day, My Diary with Lock Secret Journal App is your go-to private journal app.… View full description on the official store →

App Specs

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🔖 v1.1.1🔄 updated 0d ago📂 Lifestyle💰 Free

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📝 Description

BU Score · Transcendent

Full revenue analysis

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

Read deep-dive →