Business

FAX App keeps billing users after they cancel

In 5 weeks you can make $2,500/month by building a pay-per-fax mobile fax app.

3/5
Opportunity score5 = build it
📈3/5Market gap5 = large gap
🔨5weeksBuild timesolo, part-time
💰$2,500/moExpected MRRat month 12
4.5★ lifetime3.3★ now3.2M+ installs

Thumbtack charges pros per lead even when the customer never responds

In 10 weeks you can make $1,200/month by building a pay-only-when-hired local-services marketplace (an app clone closing the existing market gap).

2/5
Opportunity score5 = build it
📈4/5Market gap5 = large gap
🔨10weeksBuild timesolo, part-time
💰$1,200/moExpected MRRat month 12
3.2★ lifetime2.5★ now1.6M+ installs

FlexJobs hid job access behind a paywall

In 12 weeks you can make $800/month by building a better free-to-apply remote job board.

2/5
Opportunity score5 = build it
📈4/5Market gap5 = large gap
🔨12weeksBuild timesolo, part-time
💰$800/moExpected MRRat month 12
4.0★ lifetime1.6★ now533.9K+ installs

Sellvia’s fee maze created a trust gap

In 12 weeks you can make $900/month by building a better transparent dropshipping profit tracker.

2/5
Opportunity score5 = build it
📈4/5Market gap5 = large gap
🔨12weeksBuild timesolo, part-time
💰$900/moExpected MRRat month 12
3.1★ lifetime2.0★ now78.3K+ installs

Captcha Entry’s payout promise collapsed

In 6 weeks you can make $300/month by building an honest captcha practice and rewards app.

2/5
Opportunity score5 = build it
📈3/5Market gap5 = large gap
🔨6weeksBuild timesolo, part-time
💰$300/moExpected MRRat month 12
4.5★ lifetime3.3★ now209.8K+ installs

QuickBooks broke mobile workflows for sole traders

In 14 weeks you can make $2,700/month by building a better mobile invoicing and receipt tracker for sole traders.

3/5
Opportunity score5 = build it
📈4/5Market gap5 = large gap
🔨14weeksBuild timesolo, part-time
💰$2,700/moExpected MRRat month 12
4.7★ lifetime2.7★ now9M+ installs

Google Chat buried simple messaging under threads

In 14 weeks you can make $600/month by building a better threadless email-invite group messenger.

2/5
Opportunity score5 = build it
📈3/5Market gap5 = large gap
🔨14weeksBuild timesolo, part-time
💰$600/moExpected MRRat month 12
4.4★ lifetime4.2★ now77M+ installs

Flex drivers blame bugs, bots, and blind routes

In 8 weeks you can make $600/month by building a better Amazon Flex driver companion.

2/5
Opportunity score5 = build it
📈4/5Market gap5 = large gap
🔨8weeksBuild timesolo, part-time
💰$600/moExpected MRRat month 12
4.6★ lifetime2.4★ now8.5M+ installs

Shipt shoppers are punished for bugs and late metrics

In 24 weeks you can make $1,200/month by building a better shopper-first local delivery marketplace.

2/5
Opportunity score5 = build it
📈4/5Market gap5 = large gap
🔨24weeksBuild timesolo, part-time
💰$1,200/moExpected MRRat month 12
4.2★ lifetime2.5★ now3.1M+ installs

FedEx Mobile broke basic package tracking

In 10 weeks you can make $600/month by building a better FedEx tracking alert app.

2/5
Opportunity score5 = build it
📈4/5Market gap5 = large gap
🔨10weeksBuild timesolo, part-time
💰$600/moExpected MRRat month 12
3.8★ lifetime1.7★ now18.4M+ installs

Lyft broke driver trust, but not enough for a clone

In 26 weeks you can make $300/month by building a driver-first local rideshare pilot.

1/5
Opportunity score5 = build it
📈4/5Market gap5 = large gap
🔨26weeksBuild timesolo, part-time
💰$300/moExpected MRRat month 12
4.8★ lifetime3.3★ now9.5M+ installs

SAP’s mobile HR app keeps locking employees out

In 24 weeks you can make $0/month by building a better SAP SuccessFactors mobile companion.

1/5
Opportunity score5 = build it
📈4/5Market gap5 = large gap
🔨24weeksBuild timesolo, part-time
💰$0/moExpected MRRat month 12
3.5★ lifetime2.4★ now8.7M+ installs

Stripe’s mobile dashboard made payouts harder to trust

In 10 weeks you can make $1,800/month by building a better Stripe mobile companion dashboard.

3/5
Opportunity score5 = build it
📈3/5Market gap5 = large gap
🔨10weeksBuild timesolo, part-time
💰$1,800/moExpected MRRat month 12
4.3★ lifetime2.4★ now3.1M+ installs

Verification blocks applicants while scam fears grow

In 12 weeks you can make $1,200/month by building a better verified entry-level job board for India and early-career seekers.

3/5
Opportunity score5 = build it
📈4/5Market gap5 = large gap
🔨12weeksBuild timesolo, part-time
💰$1,200/moExpected MRRat month 12
4.5★ lifetime3.1★ now1.8M+ installs

FaxFree’s cancellation trap creates an opening

In 10 weeks you can make $800/month by building a better transparent pay-per-fax sender.

3/5
Opportunity score5 = build it
📈4/5Market gap5 = large gap
🔨10weeksBuild timesolo, part-time
💰$800/moExpected MRRat month 12
4.2★ lifetime2.9★ now559.5K+ installs

Microtask workers feel unpaid and unprotected

In 20 weeks you can make $1,200/month by building a better worker-first microtask marketplace.

2/5
Opportunity score5 = build it
📈4/5Market gap5 = large gap
🔨20weeksBuild timesolo, part-time
💰$1,200/moExpected MRRat month 12
4.2★ lifetime2.2★ now7.9M+ installs
FAQ →

Paycor’s login update broke clock-in trust

In 10 weeks you can make $600/month by building a better Paycor punch-proof companion.

2/5
Opportunity score5 = build it
📈4/5Market gap5 = large gap
🔨10weeksBuild timesolo, part-time
💰$600/moExpected MRRat month 12
3.8★ lifetime2.0★ now2.9M+ installs

Duo’s restore failures are locking users out

In 12 weeks you can make $1,200/month by building a portable TOTP authenticator.

2/5
Opportunity score5 = build it
📈3/5Market gap5 = large gap
🔨12weeksBuild timesolo, part-time
💰$1,200/moExpected MRRat month 12
4.2★ lifetime2.0★ now51.9M+ installs

Blue Yonder’s login failures stranded hourly workers

In 16 weeks you can make $800/month by building a better employee schedule companion.

2/5
Opportunity score5 = build it
📈4/5Market gap5 = large gap
🔨16weeksBuild timesolo, part-time
💰$800/moExpected MRRat month 12
4.5★ lifetime2.4★ now921.8K+ installs

Spark broke driver trust with pay cuts and glitches

In 8 weeks you can make $1,200/month by building a better gig-driver earnings and route companion.

2/5
Opportunity score5 = build it
📈4/5Market gap5 = large gap
🔨8weeksBuild timesolo, part-time
💰$1,200/moExpected MRRat month 12
4.1★ lifetime2.8★ now5.2M+ installs
FAQ →

UKG Pro’s update broke workday basics

In 16 weeks you can make $1,200/month by building a better frontline time-clock and schedule app.

2/5
Opportunity score5 = build it
📈4/5Market gap5 = large gap
🔨16weeksBuild timesolo, part-time
💰$1,200/moExpected MRRat month 12
4.2★ lifetime1.6★ now6.3M+ installs
FAQ →

Grubhub drivers blame glitches, penalties, and disappearing pay

In 24 weeks you can make $600/month by building a better driver-first local delivery marketplace.

1/5
Opportunity score5 = build it
📈4/5Market gap5 = large gap
🔨24weeksBuild timesolo, part-time
💰$600/moExpected MRRat month 12
4.5★ lifetime1.8★ now4.9M+ installs
FAQ →

MyWalmart burns batteries, but outsiders cannot replace it

In 10 weeks you can make $300/month by building a better battery-safe Walmart associate companion.

1/5
Opportunity score5 = build it
📈5/5Market gap5 = large gap
🔨10weeksBuild timesolo, part-time
💰$300/moExpected MRRat month 12
4.5★ lifetime1.5★ now4.1M+ installs
FAQ →

ADP broke login and clock-in trust

In 10 weeks you can make $600/month by building a better offline time-clock and paystub backup companion.

2/5
Opportunity score5 = build it
📈4/5Market gap5 = large gap
🔨10weeksBuild timesolo, part-time
💰$600/moExpected MRRat month 12
4.5★ lifetime2.3★ now38.3M+ installs

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