How much does English Grammar Book make per month?

Based on our ML-calibrated revenue forecast, English Grammar Book earns approximately $1.2K/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 English Grammar Book?

Browse the full Books & Reference 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 English Grammar Book?

English Grammar Book is published by Nithra 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 English Grammar Book's BU Score?

English Grammar Book has a BU Score of 70/100 (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.

English Grammar Book

Quality Score

Strong

English Grammar Book

Name: English Grammar Book — app revenue, audience, build cost & risk profile
Creator: bumetric
License: https://creativecommons.org/licenses/by/4.0/
Keywords: English Grammar Book revenue, English Grammar Book app analytics, mobile app revenue estimate, Books & Reference revenue, Android app revenue

High confidence

4.4 ✍️ Editor

✍️ bumetric analysis

“

English Grammar Book is an Android app from Nithra in the Books & Reference category, currently rated 4.4★ across 15,661 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.

Quality Score is 70: Strong (healthy traction). For a Books & Reference 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

$700K

per month

→

12-mo forecast

$741K – $1141K

per month

→

24-mo forecast

$886K – $1645K

per month

BIG 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

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idle

Rating

—

Reviews

—

Forecast Revenue / mo

—

Snapshots tracked

since first record

ONE-TIME · BUILD 💰 Estimated build cost

$90K

↳ What it cost to build · not monthly revenue

Likely range $70K – $120K

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

📈 Slow ROI — current MRR is well below build cost

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
💎 In-app purchase plumbing	+$9K
⚙ Books & Reference complexity ×0.95	$-2975
🌐 Cross-platform reach (iOS + Android)	+$31K

Total estimate $90K

ONE-TIME · EXIT VALUE 💵 Estimated acquisition value

$35K

↳ What it would sell for · not monthly revenue

Marketplace range $25K – $45K · 30× MRR multiple

💸 ~0.4× build cost (under-water)

Synthetic estimate. Multiple band derived from iap / freemium model + 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

💎 IAP / freemium model base	28× MRR
⭐ ★ rating ≥ 4.4 (solid)	+8%
🏷 Books & Reference category multiple	-2%

Final multiple 30× MRR

👥 Estimated audience size

1.7M

Lifetime downloads (US-equivalent)

Monthly active

170K

Daily active

34K

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

📲 Books & Reference engagement	~110 installs / rating
🔁 Books & Reference D30 retention	10%
📍 DAU / MAU stickiness	0.20

DAU / MAU 20% sticky

🔬

How we forecast this revenue

MEDIUM CONFIDENCE

Baseline

$700K/mo · ML-estimated from 234 triggers

Growth rate

+2.5% MoM · BIG tier baseline (compound monthly)

6 months

$690K – $933K

12 months

$741K – $1.1M

24 months

$886K – $1.6M

Compound growth at +2.5% MoM (tier baseline for BIG). Range widens with horizon — typical noise band ±15% at 6mo.. Ranges widen with horizon — distant futures carry more uncertainty.

📊

BU Investment Matrix

Mixed signals · 65/100BIG TIERcompetitive but cautious

Growth Velocity

5.0

Founder Strength

7.2

Product Quality

8.8

Revenue Strength

5.8

Monetization Maturity

5.0

Defensibility

10.0

Market Position

0.0

Operational Safety

10.0

💰 Revenue: Healthy — $280K - $1540K/mo · BIG tier · medium-low confidence, trajectory unclear.
⭐ Quality: 4.4★ across 15,661 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: Strong subscription moat. Hard to outcompete on retention. Better angle: free alternative with one-time purchase, or feature parity for an underserved sub-niche.

💵 For acquirers: Estimated asking range 18-32× monthly = $12.6M-$22.4M.

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:

Mid install base (15,661 ratings)METRIC		+$5,500
Mature app (11y old)METRIC		+$1,500
Good rating (4.4★)METRIC		+$800
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: English Grammar Book
Developer: Nithra
Bundle ID: com.nithra.bestenglishgrammar
App Store URL: Open in App Store
Category: Books & Reference
Content rating: Not found
Languages: Not found

Company

Website: nithra.mobi
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: $1.2K/mo
Top-grossing rank: Not found
All-time revenue: Not found
Pricing: $0.99 per item

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 growth15,661 ratings+37% lifetimeShow 3-year history estimate ▾

Tracked (1 weeks) Pre-tracking estimate (37 weeks) · model-based, ±5% noise · anchored to release date and current value

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

Free English Grammar app offline is the best way to improve your English grammar skills. This English Grammar Book Offline helps you to learn the rules of grammar in the English language. This can be done more easily by practicing the grammar exercise and taking the regular grammar test in this grammar app.

The vocabulary app offline helps you to improve your grammar skills on daily basis. This Grammar app is the best English learning app offline for android phones. This English grammar offline free is available at free of cost.… View full description on the official store →

App Specs

🔐 Own this app? Claim & verify MRR →

🔖 v4.41🔄 updated 0d ago📂 Books & Reference💰 Free📺 Ad-supported💎 IAP $0.99 per item

🧪

Tech & Domain Intel — nithra.mobi

Mail provider: Google Workspace

Derived from public RDAP + DNS TXT records (no scraping, no login).

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📝 Description

BU Score · Transcendent

Full revenue analysis

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

Read deep-dive →