Head-to-head · Best Mosquito Traps

Flowtron BK-15D Electronic Insect Killer vs Katchy Indoor Insect Trap (Original)

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

Katchy Indoor Insect Trap (Original) comes out ahead by a narrow margin (4.0 vs 4.3). The gap is mostly about Bedrooms, kitchens, and apartments dealing with indoor gnats, fruit flies, and occasional mosquitoes — read the strengths below before deciding.

Ranked #5 in Best Mosquito Traps

Flowtron BK-15D Electronic Insect Killer

4.0

2 sourcesall derived$59.99as of Aug 3

In the budget bug zapper class the Flowtron BK-15D is the volume leader and the cheapest 'real' attractant trap in this lineup, with a 5,600-volt grid, an included octenol cartridge and a 2-year warranty. The honest case against it is the case against every UV bug zapper: independent entomology research has repeatedly shown that under 10% of the catch is actually biting insects. The other 90%+ is moths, beetles and beneficial pollinators. As a $60 noisemaker for a barn or workshop it earns its keep. If mosquito reduction specifically is the goal, the DT2000XLPSR is the smarter $99.

Strengths

— 5,600-volt non-clogging grid is the strongest in the budget zapper class
— Half-acre coverage with included 100-hour octenol attractant cartridge for the first season
— Built-in 2-year warranty (longer than DynaTrap, Katchy, or any Thermacell)

Watch-outs

— University of Notre Dame and Delaware research found only 4.1-6.4% of zapper catches are actually mosquitoes the rest are beneficial moths, beetles, and parasitoid wasps
— Audible snap with every kill, which is the entire opposite of 'quiet patio operation'
— UV bulb commonly fails before the 1-year mark and replacement bulbs run ~$20

$59.99 · Check Price on Amazon Full review →

Higher ratedRanked #2 in Best Mosquito Traps

Katchy Indoor Insect Trap (Original)

4.3

4 sourcesall derived$44.99as of Aug 1

The Katchy Original is the only indoor-focused trap in this lineup, and 63,000+ Amazon reviews make it the SERP dominator for the 'indoor mosquito trap' query. A triple-action stack (UV light to attract, fan to pull in, sticky glue board to hold) runs silently on USB or wall power. Honestly, it handles fruit flies and gnats better than mosquitoes; per MosquitoReviews testing the mosquito catch is real but modest. As a chemical-free, kid-and-pet-safe indoor option it has no real competition under $50. Use it in a bedroom or kitchen as a complement to outdoor control.

Strengths

— 63,000+ 4 and 5-star Amazon reviews makes this the highest-volume indoor mosquito trap on the market
— Triple-action UV + suction fan + glue board with zero chemicals or zapping noise
— Two-fan settings let you trade noise for catch power

Watch-outs

— Coverage is only 320 sq ft a single room, not a yard
— Most effective at night with room lights off; daytime catch rate is significantly lower
— Catches gnats and fruit flies more reliably than mosquitoes

$44.99 · Check Price on Amazon Full review →

Derived means the reviewer published no score, so one was inferred from their written verdict. Everything else is a number the publisher printed. How we rank.

How they stack up

Flowtron BK-15D Electronic Insect Killer

The cheapest real attractant trap in the lineup and the only one with an audible electric grid the DynaTrap DT2000XLPSR and Mosquito Magnet Patriot Plus both kill silently. Has the worst pollinator-impact profile here, with independent research showing under 10% of the catch is mosquitoes versus the more selective Mosquito Magnet. The Katchy is similarly UV-attractant-based but indoor-only and zap-free.

Katchy Indoor Insect Trap (Original)

The only indoor-focused trap in this lineup the DynaTrap DT2000XLPSR, Mosquito Magnet Patriot Plus, Thermacell E90, and Flowtron BK-15D are all outdoor units. Doesn't compete on coverage area (320 sq ft versus the DynaTrap's full acre) but earns its slot as the complementary indoor pick for bedrooms and kitchens. Quieter than the Flowtron and chemical-free, unlike the Thermacell E90.

Specs side-by-side

Spec	Flowtron BK-15D Electronic Insect Killer	Katchy Indoor Insect Trap (Original)
Coverage Area	1/2 acre	320 sq ft (single room)
Trap Type	15W UV bulb + octenol attractant + 5,600V electric grid	UV light + suction fan + sticky glue board (no zapper, no chemicals)
Power Source	AC corded	USB or AC adapter
Bulb Type	15W BF-35 UV replacement bulb	—
Grid Voltage	5,600V (vs ~4,200V competitor standard)	—
Attractant Refill Required	Octenol attractant strip every 30 days (~$8)	—
Weight	4.1 lb	1.1 lb
Dimensions	8.5" L x 8.5" W x 11.8" H	5" diameter x 9" tall
Warranty	2-year limited	2-year manufacturer
Material	Plastic	Paper
Fan Settings	—	2-speed (quiet / strong)
Glue Board Life	—	~1 month typical use
Glue Board Cost	—	~$5 per replacement (Katchy refill pack)

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