The directory
All gaps
1914 validated product opportunities, ranked by demand score. Jump into a category, or page through them all.
Travel data scraper for flight and hotel pricing
“Fiverr freelancer will provide Data Scraping services and scrape travel related data, air tickets, hotels using python including Sources scraped within 1 day”
Transparent survey platform with fast payouts
“***UPDATED from previous review*** This app is TRASH!! Constant disqualifications halfway through surveys then the ones that you do complete and submit after a…”
Jotform Sign to payment processor integration
“1 day ago · Summary. We are looking for an experienced API automation specialist to help connect Jotform Sign with Pay Advantage.”
AI workspace router to commercial LLM providers
“Add Codex, XAI, Claude, etc I would love to use this software but don't have a good enough computer to run local models. Paying for API can be expensive, adding…”
Note-taking app with unlimited free notebooks
“I’ve been using Freenotes for 2.5 years now and I really used to love it, it used to be perfect. But now the paywall has become so limiting it’s more annoying t…”
Cost estimator for trades with stable quotes
“Surely someone has told you guys by now that this software absolutely cannot be used to share quotes with clients? When they ask for the most minor of changes, …”
Flexible invoice builder with customizable fields and order
“To Complicated and forces the information , they want you to right now , not you :(( That universal Just specific job. I tried to create the invoice: didn’t al…”
Survey app with upfront earnings and no ID verification required
“A lot of the "honest" answers I give, as a born-disabled USA resident, actually disqualify me for many, MANY surveys. The ads that tell you that you can easily …”
Budget tracking app with reliable data persistence
“Confusing, no instructions, budget set 3 times and I lose some entries when I close and reopen. Good luck getting any help from chat or email support.”
Freemium note-taking app with AI features
“The name is deceiving now. You basically have to pay to use this app. I understand if you want to earn money, you’ll limited some of the features. However, you …”
Backup entry-code delivery system for hospitality platforms
“You rely 100% on receiving a digital entry code. Because Agoda’s system malfunctioned, no entry code was ever generated, meaning there was literally no way to e…”
Support triage tool that routes billing disputes to agents quickly
“Terrible experience with trying to reach them. I clearly remember looking to try it and selecting one time option. I just got charged for my second order (appar…”
Subscription platform with transparent renewal controls
“I don't think there is anything wrong with their software, but I am giving a low score because it is not possible to turn off auto-renewal, and there is no…”
Subscription manager for family accounts with granular controls
“This is an impossible company. I was paying for lines for all my kids and had them on auto renew. When my son got his own line, he ended his account and got a n…”
Time tracking app for variable-income workers
“I do not earn a set hrly wage and this gave the impression I could add my $ in at the end of each log, you cannot, you have to have a set wage per hr, but I can…”
Travel insurance comparison tool that validates claim eligibility
“XCover – the company I had trusted for so many years of flying – actually does NOT reimburse you if you miss a flight due to force majeure (like a parent gettin…”
Cloud accounting app with automatic backups and recovery
“Had this app for year & loved it. Yesterday woke up and it wouldn’t open. I deleted it & restarted it and everything is new. I paid extra to backup my data and …”
Multi-channel paid ads campaign optimizer and reporting tool
“Noventra Group is hiring a remote Paid Media Specialist to support Meta Ads and Google Ads campaigns across selected partner-brand initiatives. This role is foc…”
Real estate lead platform with verified sources
“I spent 2000$ on this app and they gave me nothing but fake leads a waste of money I wouldn’t suggest it for no one”
Bookkeeping app for freelancers with cloud sync
“I had been using this simple bookkeeping app for several years. Then one day I opened it and all but my first year’s entries were gone. FAQ mentioned only PAID …”
Bank sync tool using OAuth instead of credentials
“I paid for a lifetime license yet my bank account is not listed for syncing and the ones that are listed you have to share bank credentials. Why? This should se…”
Expense tracker that auto-imports bank transactions, SMS, CSV, and PDFs
“this app is not collaging data automatically from sms as well.as CSV files and pdf files ...very disappoint even if I have taken paid membership yesterday -plea…”
AI model comparison tool that audits provider claims
“Trae's "Claude 4" lacks the standardized tools and capabilities that actual Claude Sonnet 4 provides. This isn't a minor version discrepancy…”
Invoicing platform with locked feature guarantees per tier
“Slowly but surely, every good feature I’ve been using as a pro subscriber, becomes an Elite subscription service. I’m moving to a different platform.”
Invoice management tool with permanent access after cancellation
“Once you end your subscription you have no access to the past invoices you paid to create.”
Social media scheduler with reliable carousel post delivery
“For months now the app has stopped posting multiple images. it does not matter how far out they are scheduled or if it's just two or six, the app will only post…”
Budget expense tracker with data import and transaction classification
“At first, I really liked the reporting view and UI that I instantly paid for the premium. However, I faced constant recurring bugs during importing data from ot…”
Document editor with tabs and split-screen
“The latest problem in their updates removed my ability to have already open Docs in Goodnotes, and to bring up the display of all my open docs at the bottom of …”
Lightweight, reliable invoicing app
“I had this app for about a year ! And it went up on the prices since I had it . It’s always freezing up making me redo an invoice. It’s becoming an issue with g…”
Digital photo frame with unlimited storage and transparent pricing
“I bought several of these frames for family members to share family photos. The frame came with unlimited online storage for photos. It was great. Since then Ni…”
Bank-sync expense tracker with multi-factor authentication
“Disappointing. Paid for the premium, in order to sync with my bank. But since I use a MFA with my login credentials for my bank (because security), I can't get …”
Premium SaaS support with live chat and SLAs
“The biggest disappointment for me has been the customer support. Whenever I run into an issue, it's nearly impossible to get help from a real person. Most …”
Invoicing tool under 300 per year
“Only issue is sometimes doesn’t save entered data Or send receipts to customers ... Wasn’t able to print invoices off of the program. For some reason won’t let …”
Streaming quality diagnostics with auto-bitrate adjustment
“Then I cancelled. They kept charging me and will not refund the fraudulent charges. ... The amount of ads are terrible, but that's not even why I'm wr…”
Social media calendar and content scheduler across multiple platforms.
“Company Description Digital Style House (DSH) is an Inc. 5000-ranked social media marketing agency based in Los Angeles, serving over 100 active clients and 1,1…”
Infrastructure monitoring and silent failure alerts
“Jun 18, 2025 · I'd pay for something that tells me when my systems break instead of finding out from customers or revenue dropping. Quiet failures in ops ...”
Streaming service billing and access verification system
“I just paid this app NOT even a week ago and I can't watch anything smh WOW really? NEVER had this problem with Zeus, Philo, Netflix etc. It definitely won…”
Temporary phone number service with easy cancellation
“You will never be able to cancel your account and will be continuously charged your monthly fee. I still can't get them to stop charging me. They do not an…”
PDF signing tool with free download, pay only for advanced features
“Will let you do your job and after you've spent your time making the document it will ask you. for money to download”
iPad note app with reliable printing and PDF export, no login required
“I have used Notability for over a year. It provided a simple, yet powerful way to take notes on my iPad. I could then print the notes to my printer. Recently…”
Mobile invoice app for freelancers and small businesses
“At first, the app worked perfectly and did exactly what it was supposed to do. Because of that, I decided to subscribe to the Premium plan to access all feature…”
Habit tracker with smart reminders for keystone habits
“I paid for subscription (no free trial) and had to cancel it. Despite many positive reviews I think it’s not a good app. It reminds you of vast variety of habi…”
eBay-to-Shopify inventory and order sync tool
“If you'd like to pay 20$ a month for a service that will cause you trouble because it just doesn't work: we totally recommend Inkfrog. If you are look…”
Ad-free note-taking app with easy export
“I have been using this app for four years and I absolutely loved it. In the time I have been using this app, I’ve been through its many updates and changes. At …”
Ad-free note-taking app with easy export
“I have been using this app for four years and I absolutely loved it. In the time I have been using this app, I’ve been through its many updates and changes. At …”
Tutor scheduling platform with payment protection for cancellations
“Varsity Tutors has a lot going for it. I've connected with some great students and navigated a clunky interface (which functions like Zoom but with more glitche…”
Subscription management with transparent cancellation
“I got malware when downloading files, files weren't compatible with my mobile devices, and it just wasn't easy to use. Signing up is easy. There is li…”
Lightweight mobile CRM for field work
“This is a paid app, yet it behaves like a broken beta version. The app crashes every time you take a photo and shuts down without warning. It’s unreliable, wast…”