Is the lunar calendar (Vietnam) app market saturated? What the Google Play US data says

89 keywords measured on Google Play US, last scanned 2026-11-02. Figures are read directly from store pages, not estimated.

NEW ENTRANTS · 12 MONTHS

How many lunar calendar (Vietnam) apps released in the last 12 months are ranking on Google Play US today, and how many reached the ratings threshold?

No newcomer has survived here 5 apps holding top-10 were released 6–12 months ago and none reached 50 ratings; 5 more were released in the last 6 months and are too young to judge.

Released 6–12 months ago, past 50 ratings

0/5

top-10 apps released 6–12 months ago that reached 50 ratings

Too young to judge

released in the last 6 months, not counted either way

Over 24 months

0/13

same ratings threshold

Median release year, top-10

2023

of 55 dated apps

Store autocomplete confirms people search for this niche. Searched for: "lich am duong 2026" suggested after typing 39% (position 1). Seed "lịch âm" never suggested.

Rating counts on Google Play are worldwide, not one country, so the 50-ratings threshold is easier to clear here than on the App Store. Read this figure against Play; the App Store page for the same niche is a different scale.

WHAT WINNERS CHARGE

Are lunar calendar (Vietnam) apps profitable, and what do the top apps on Google Play US charge?

3 of 4 sell in-app purchases, top prices range from 4.49 USD to 144.99 USD.

Real prices, read from each app's own store page, not estimated

App holding top-5	Ratings	What it charges	Last update
Google Calendar	4,920,205	free, sells nothing	updated 2026-11-02
Lịch Vạn Niên 2026 - Lịch Âm	143,786	9.49 USD — IAP $0.99 - $9.49 per item	updated 2026-09-21
Lich Van Nien 2026 - Lich Viet	75,628	144.99 USD — IAP $0.49 - $144.99 per item	updated 2026-10-09
Lich Van Nien 2027	24,628	4.49 USD — IAP $4.49 per item	updated 2026-10-23
Lịch Vạn Niên 2027 - Lịch Âm	23,293	page not fetched	updated 2026-10-29

REVENUE CHARTS

Do lunar calendar (Vietnam) apps make money on Google Play US, judged by days on a top-grossing chart?

Not measured on Google Play. The App Store publishes its category charts as a public feed; this report reads that feed and nothing equivalent on Google Play.

See the App Store figure for lunar calendar (Vietnam) →

KEYWORDS

What do people search to find a lunar calendar (Vietnam) app, and which keywords does nobody target?

None of these 8 keywords has a top-10 app aiming at it.

Keyword	Difficulty (0–100)	Apps targeting it
lịch âm trên màn hình khóa	10	nobody — 0/10
lịch âm hiển thị màn hình	13	nobody — 0/10
lịch âm không quảng cáo	16	nobody — 0/10
lich tay va lich am	17	nobody — 0/10
hình nền lịch âm dương	18	nobody — 0/10
lịch âm không chứa quảng cáo	18	nobody — 0/10
lịch âm ko quảng cáo	18	nobody — 0/10
trung hoa âm lịch	18	nobody — 0/10

78 more keywords in the full report.

How to read this

Difficulty is the cost of reaching the top, 0–100. "Apps targeting it" counts top-10 apps carrying every word of the keyword in their name or subtitle.

COMPLAINTS

What do users complain about in the top lunar calendar (Vietnam) apps?

Most common: Ads, 25 of 78 classified 1–2★ reviews.

Ads25/78

Crashes & bugs9/78

Hard to use3/78

Inaccurate data3/78

Privacy & permissions2/78

Slow & battery drain1/78

Missing feature1/78

Other34/78

How to read this

Google ranks these by how many people found them helpful, which leans towards complaints — so the shares show which problems dominate, not how many users hit them.

Each 1–2★ complaint was assigned one theme by an AI model. A second AI model re-read 100 random labels in September 2026: about 7 in 10 matched its own pick and 9 in 10 were a reasonable reading. Read the order of the leading themes, not exact shares. Classified on 2026-10-09.

OTHER STORE

Is the lunar calendar (Vietnam) app market different on iOS (the App Store)?

See lunar calendar (Vietnam) on App Store US → 0 of 13 top-10 apps released 6–12 months ago reached 50 ratings there