The directory
All gaps
1914 validated product opportunities, ranked by demand score. Jump into a category, or page through them all.
A lightweight calendar app with instant sync across devices
“I use the calendar regularly on my desktop. It takes WAY too long for any changes I make to reflect on the app. By long, I’m not talking a minute or two. I mean…”
Spending tracker for credit unions and regional banks
“I purchased this app anticipating it would track my credit union account, but it does not. You can only sync the most popular US banks.”
Document signing platform with multi-client workspace management
“User reviews · “Often very slow to load and it would be better if multiple clients could be loaded at once without crashing.” · “Some of the more advanced ...”
Mobile task manager with markdown support
“So buggy! 1) Lost SO many notes - Needs autosave - It uses a confusing save checkmark (but also a different checkmark for complete) 2) editing list titles is im…”
Cross-domain parameter passing plugin for Glide apps
“Hi guys, Hope you’re fine! We’re just catchnig up with Glide options, and are struggling with this use case: we want to interface our app to a partner eshop. Us…”
AI security module for LLM applications
“AI Security Shield: PII Redaction + Prompt Injection Test Harness”
Data validation and cross-system sync platform
“Remote Data Entry Specialist - Assistant Administrator Work Mode: Remote We are seeking a Remote Data Entry Specialist - Assistant Administrator to support data…”
Multi-tenant proxy for Azure AD portal access
“I am a CSP partner and have access to all my Tenants via the Admin Center. I have been running into situations where I need to change a users cell number for 2F…”
Contractor proposal tool with direct PDF delivery
“The app has now been glitching and adding new items to bids on its own somehow. Also I really hate how bids are being sent out to my customers now. They have to…”
Usage metering and billing system for AI SaaS
“Hey! I want to track the usage of users on my platform which is powered by GPT3. I basically want to measure how many calls a particular user does so that I can…”
Cross-platform VPN client for all devices
“Very nice if you only want to use it for iOS or android only. Not recommended for macOS”
Document signing app that exports reliably to downloadable PDFs
“can sign documents but when I download them, they are no longer pdfs. cannot get the app to download a PDF, online help is useless. The app has no function with…”
A budget app that connects Cash App, Affirm, Afterpay, Klarna.
“I feel like a bunch of people use Cashapp, Affirm, Afterpay, Klarna etc. and for Rocket Money to still not have those as linkable just ruins the app for me. I’m…”
Automated software update manager for macOS
“I've been a happy user of CoreCode's MacUpdater - a tool for macOS that automatically compared versions of local applications against the latest known…”
Agent memory layer for n8n workflows
“How are teams managing agent memory and context at scale in n8n?”
Task management app with reliable offline sync
“New update not saving tasks. It’s useless after the last update”
Note-taking app with local-first sync and backup redundancy
“Horrible , I’ve been using it for years and there’s been multiple times all my notes disappear. Usually they’ll load back after a whiiile but this last time I h…”
Mobile appointment scheduling with reliable persistent payment processing
“app was fantastic up until an update in Feb, and since then, it can't process credit card payments, UNLESS I clear the app data and cache between EACH TRANSACTI…”
Stable appointment scheduling app for businesses and clients
“Sad Squarespace. Nothing works after this update, that happened weeks ago. I've used it for over 8 years. Now it barely signs me in—and the client interface has…”
Remote support with limited access and transparency
“He was here over 3 hours, putting monitors, changing the systems on my tvs that are on the walls, and doing lots of re wiring. Then 'Joe', who was on …”
Cross-repository milestone tracker for GitHub organizations
“It would be very useful to have organization-wide milestones. I'm the lead developer an OS, and we use GitHub for development and version planning. What we real…”
Field service dispatch and ticketing app
“Woke app. If their were negative stars,I would've selected.They should call it PHONE SERVICE instead as you will spend more time on your phone dealing with this…”
AI content detection tool
“The user experience was often described as frustrating and useless, with the tool struggling to differentiate between good grammar and AI writing. Some people a…”
Monitoring dashboard for n8n workflows
“How do you monitor if your n8n workflows are still generating business results?”
Mobile CRM and workflow tool for field teams
“Pretty obvious that most of the functionality is missing on mobile. Workflow doesn’t exist here and information is several clicks away and takes forever to load…”
Lightweight inventory app for small businesses
“Just trying to digitize my inventory but it only allows me to organize items alphabetically or by date created instead of by ID. So ID for each item is useless …”
Shopify app separating returns from refund events
“Store URL Store description Online store selling premium men’s activewear and athletic apparel including shorts and pants. What feedback do you want? Shopify…”
Email campaign builder with drag-and-drop templates
“Just downloaded for the first time can't start campaign because you can't edit templates with your own images, what a waste uninstalling.....”
Mobile accounting app for self-employed users
“This app is useless! Can't even use it on my phone as it keeps telling me to use the web browser so what even is the point? The self employed version is what I …”
Free PDF signing and download tool
“Created a PDF and signed it but was then asked to purchase a plan in order to download it. If the basic function of downloading a PDF cost money then the app ma…”
Version control system for Make.com scenarios
“I would like to modify a scenario without taking it into use. A way to do this is to have different versions of a scenario and then determine which one is activ…”
Salesforce integration for Klaviyo email engagement metrics
“To say that the question is answered is simply not true. @sanderk I am keen to know if you have found a working solution by now. ... @BBorseth - are you still l…”
Lab inventory system with expiration and location tracking
“I did not care for the inventory system that was built-in because I think it lacks some key capabilities and function. It does work as a basic inventory system …”
Email tracking tool with anonymous sending option
“Cons: Some of the things that i dislike is the lack of total anonymous if i sent email from this software. It will publicly show and printed on the footnote of …”
Social media scheduler with Instagram direct publish
“I like this tool i just wish we are able to auto publish to IG directly instead of manual posting. This is very overwhelming with multiple account. Overall this…”
E-signature app with persistent document editing
“When I fill out paperwork on my end and then save it, I can’t go back into it and edit the edits that I made. Even if I have to anyone else to have it signed. I…”
Tax setup wizard for appointment scheduling platforms
“DO NOT USE THIS APP!!!! DO NOT DOWNLOAD!!! I’ve had one of the most frustrating experiences with Acuity Scheduling. If I could give zero stars, I would. The cu…”
NAS file indexing and search tool with OCR
“I am looking for something that can index my NAS and provide a interface to search contents of files. Processing images and doing OCR/Metadata extraction for fi…”
Multi-source analytics dashboard for unified KPI tracking
“We currently use google sheets to pull together performance of webpages across the multiple platforms they integrate with. It's a laborious, manual process. We …”
Reliable time tracking app with real-time job sync
“For the last month and a half I’ve had nothing but problems with this app not allowing me to pick jobs that should be available, putting time in one day and it’…”
Appointment scheduler with persistent settings and support
“I have had nothing but issues with this app since I purchased the service. Nonstop issues with not being able to take payment. I am constantly having to uninsta…”
Fast social media scheduler for batch posting
“This app needs a lot of work. Takes forever to upload content, doesn’t allow you to upload cover photo, takes over 30 min to plan a post. Causes more frustratio…”
Mobile payment processing with offline queuing
“Most of the time, purchasing from the mobile app doesn't work and gives an error.”
Print-on-demand ecommerce with subscriptions and physical products
“This is a good product that has great potential but it lacks in polish & completion. I have used it and it does for the most part work well for a truly Prin…”
Mobile webapp compatibility extension for MS Teams across browsers
“Used Brave browser just now and it worked, though I have to reload a few times. Then I pinned it as webapp and it's working. ... Latest update as of May 26…”
White-label omnichannel support queue for enterprise SaaS
“Microsoft's reputation is marred by significant customer dissatisfaction, primarily due to its inadequate customer service. Many users report frustrating e…”
Contract lifecycle management with workflows and e-signatures
“Alternatives considered · Concord · Clearview · ContractZen · CobbleStone Contract Insight · Aptien · Reason for choosing ContractSafe · Price, unlimited users,…”
DKIM configuration tool for Office 365 custom domains
“However, there is no option to enable the DKIM security measure in the premium interface for your own personalized email addresses / own email domain. Without D…”