Is leisure time calcium booster profitable to sell on Amazon United States?

The niche generates $46K/yr across 5 tracked products. 90-day search growth is +37.3%. Flapen's verdict: Skip it (43/100).

How competitive is the leisure time calcium booster niche?

3 brands and 46 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in leisure time calcium booster?

Top complaints mined from reviews: Leak-Proof. The return rate is 0.4%.

When does demand for leisure time calcium booster peak?

Demand peaks in Aug–Sep–Oct; the busiest month runs 2.6× the quietest.

What does it cost to enter the leisure time calcium booster niche?

Listings span $10.49–$36.45; the average listing price is $19.41 (sweet spot $15–$100). The average incumbent carries 1,965 reviews — the moat a new listing must climb.

leisure time calcium booster

Skip it

A concentrated shelf (top 5 take 100% of clicks) — this niche doesn't clear our bar today.

Conversion

Incredible38.3%

search→purchase rate — share of searches ending in a sale

Returns

Incredible0.4%

return rate — above 5% kills the launch gate

Avg price

Great$19.41

avg listing price — sweet spot $15–$100

Price range

Great$10.49–$36.45

cheapest to priciest tracked listing — scored on the share inside $15–$100

Growth

Good+37.3%

90-day search growth — must beat 0% to launch

Review moat

Okay1,965.2

avg incumbent reviews — the moat a new listing must climb

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Market size

Bad$46K

$46K/yr · 6K searches

Competition

Bad100%

top-5 click share — a locked-up shelf

Brand share

Bad100%

top-5 brand share — brand-locked demand

According to Flapen's Amazon United States niche tracking, leisure time calcium booster is a $46K/yr Amazon United States market (6K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Aug–Sep–Oct. Verdict: Skip it — 43/100.

Data updated Jul 24, 2026 · scored weekly · How we score niches

leisure time calcium booster market data

Units sold / yr: 2K–3K; avg 250–500/product
Revenue / yr: $39K–$49K; units × avg price
Conversion rate: 38.3%
Avg BSR: #103
Page quality: 0%
Prime: 100%
Sponsored: 100%
Out of stock: 0.0%
Avg brand age: 90 months
Avg seller age: 165 days

Competition & brand share

The top 5 products capture 100% of clicks — a locked-up shelf that new listings rarely crack.

Brands

3 falling

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

100%

Top 20: 100%

Open market

LEISURE TIME91%
My Garden Pool5%
MAV AquaDoc4%

Demand & seasonality

Weekly Amazon search volume, last 103 weeks — +37.3% search growth over the last 90 days.

Peak months: Aug, Sep, Oct · busiest ÷ quietest = 2.6×

Open Trend

Top leisure time calcium booster search terms

leisure time calcium booster5K/yr +46.7%34.4% conv.
calcium booster for spa hot tub1K/yr -16.2%14.5% conv.
leisure time calcium booster for spa hot tub55/yr -50.0%0.0% conv.

All search terms

Top leisure time calcium booster products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 5 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Leisure Time 22330 Calcium Booster for Spas and Hot Tubs 1 lb

LEISURE TIME$14.154.5★97 rev

Leisure Time 22339A Spa Up pH Increaser for Hot Tubs Prevents Corrosion and Equipment Damage Compatible with Various Sanitizers 2 lbs

LEISURE TIME$10.494.7★6,867 rev

Leisure Time CB Calcium Booster for Spas and Hot Tubs 32 fl oz

LEISURE TIME$36.454.7★2,092 rev

Leisure Time Calcium Booster 1 LB with My Garden Pool 20 Ct. Test Strips & Scum Sponge Flower Oil-Absorbing Sponge for Hot Tubs and Pools

My Garden Pool$17.674.7★58 rev

AquaDoc Spa Calcium Hardness Increaser Hot Tub Owners Rely on Calcium Increaser Spa Hardness Increaser & Calcium Booster for Hot Tubs

MAV AquaDoc$18.304.7★712 rev

Newest

by launch date

Leisure Time Calcium Booster 1 LB with My Garden Pool 20 Ct. Test Strips & Scum Sponge Flower Oil-Absorbing Sponge for Hot Tubs and Pools

My Garden Pool$17.6758 rev

2y ago

Leisure Time 22330 Calcium Booster for Spas and Hot Tubs 1 lb

LEISURE TIME$14.1597 rev

2y ago

AquaDoc Spa Calcium Hardness Increaser Hot Tub Owners Rely on Calcium Increaser Spa Hardness Increaser & Calcium Booster for Hot Tubs

MAV AquaDoc$18.30712 rev

5y ago

Leisure Time CB Calcium Booster for Spas and Hot Tubs 32 fl oz

LEISURE TIME$36.452,092 rev

16y ago

Leisure Time 22339A Spa Up pH Increaser for Hot Tubs Prevents Corrosion and Equipment Damage Compatible with Various Sanitizers 2 lbs

LEISURE TIME$10.496,867 rev

19y ago

What buyers say about leisure time calcium booster

What buyers praise and complain about, mined from review topics.

What buyers love

Advertised Vs Actual Product28%

“As described”

Quality-Overall28%

“Great product”

Ease Of Use22%

“Easy to use”

Value For Money11%

“Great price”

Strength11%

“Effective”

What buyers complain about

Leak-Proof100%

“the contents spilled all over in the packaging”

Top return reasons

Leak-Proof42%

Advertised Vs Actual Product27%

Value For Money8%

Contamination5%

Functionality-Overall4%

Product Condition4%

Size-Overall2%

Water Resistance2%

Defective Material/Parts2%

Pressure1%

Common questions

Is leisure time calcium booster profitable to sell on Amazon United States?: The niche generates $46K/yr across 5 tracked products. 90-day search growth is +37.3%. Flapen's verdict: Skip it (43/100).
How competitive is the leisure time calcium booster niche?: 3 brands and 46 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in leisure time calcium booster?: Top complaints mined from reviews: Leak-Proof. The return rate is 0.4%.
When does demand for leisure time calcium booster peak?: Demand peaks in Aug–Sep–Oct; the busiest month runs 2.6× the quietest.
What does it cost to enter the leisure time calcium booster niche?: Listings span $10.49–$36.45; the average listing price is $19.41 (sweet spot $15–$100). The average incumbent carries 1,965 reviews — the moat a new listing must climb.