Comparison

loomlock vs Underground Prepper

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

loomlock

Read full description

The ultimate companion app for your loomlock devices*. Tap your loomlock key to block apps and start focusing. Lock away distractions and temptations with your loomlock and start building better habits. Track every session, create accountability with friends, and break free from unwanted habits. **Flexible App Blocking** loomlock uses Apple's Screen Time API to block distracting apps during your focus sessions**, helping you cut down on doom-scrolling, build better habits, and become more productive. - App Groups: Create and customize your own lists of apps to block, or use ready-made groups like "Focus” and “Be Present” - Scheduled Blocking: Set recurring schedules to automatically block apps at specific times - Blocking Modes: Choose to block distracting apps or allow only those which are essential or productive - Quick and Easy Blocking: Assign app groups to your loomlock keys to block apps with just a few quick taps. **Session Logging and Journaling** Build self-awareness, understand your habits, and track your progress. - Log Sessions: Start and end sessions to track your focus and habit-building sessions - Write Journals: Reflect on each session with mood tracking and guided journal prompts - Session History: Track sessions over time, allowing you to view progress **loomlock Device Integration** Bridge the physical and digital by registering your loomlock products and customizing their functionality. - Register Your Products: Register your loomlock devices with the app - Customize loomlock keys: Assign specific app groups and settings to each loomlock key - Quick-Start Sessions: Tap your loomlock key to your phone to quickly block apps and start a timed session - Physical Connection: Using a physical loomlock key reinforces your commitment with every use. **Participate in loomlock Experiences** Tap in at participating venues to block distracting apps and be fully present, whether you're working out, socialising, or taking some time for yourself. No sign-in or loomlock device required. **Social Accountability (Lockers)** Stay motivated by sharing your journey with others. - Create Lockers: Create private groups for shared accountability - See Friends' Activity: See what your locker members are up to and cheer each other on. * At least one loomlock device (key or loomlock) is required ** Requires a loomlock key

About

Underground Prepper

This app helps you prepare for emergencies by tracking your family's supplies, readiness tier, and bugout bag contents. It offers detailed inventory management, offline functionality, and privacy-focused data storage.

Highlights
  • Family emergency preparedness tracking
  • Offline inventory management
  • Preparedness tier calculation
  • Bugout bag management per member
  • Detailed supply categorization
  • Exportable inventory reports
  • Built-in Bible reader
Features
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When something goes wrong — a natural disaster, a power outage, a supply chain collapse — you won't have time to figure out where your family stands. You need to already know. Underground Prepper is a family emergency preparedness app built around one core idea: knowing exactly what you have, where it is, and whether it's enough — before you ever need it. --- YOUR DATA STAYS ON YOUR DEVICE Underground Prepper is built privacy-first. Every item in your inventory, every household member profile, every checklist — it all lives in an encrypted database on your device. Nothing personal ever touches our servers. The app works fully offline, by design, because the moment you need it most is often the moment the internet goes down. --- TRACK YOUR PREPAREDNESS TIER The app measures your family's readiness across four tiers — 3 days, 3 weeks, 3 months, and beyond. Your current tier updates automatically as you build your inventory. No guesswork. No spreadsheets. Just a clear picture of where you stand and what you still need. --- MANAGE YOUR FULL INVENTORY Organize your supplies across 14 categories: Food, Water, First Aid, Security, Power, Communications, Tools & Hardware, Clothing & Gear, Sanitation & Hygiene, Medications & Supplements, Financial & Documents, Fuel, Camping & Shelter, and Seeds & Agriculture. Every item tracks quantity, expiration dates, storage location, owner, and — for food — calories per serving. Expiration warnings surface automatically. Built-in recommended items lists help you get started fast. --- BUGOUT BAGS FOR EVERY MEMBER Every household member gets their own bugout bag. The app tracks five milestones per bag — Food, Water, Shelter, Defense, and First Aid — and shows exactly how many calories and how much water each person still needs to reach their goal. --- HOUSEHOLD MEMBER MANAGEMENT Add your entire household with individual calorie and water requirements calculated from age, gender, height, and weight. Members can have their own PIN-protected access. As the account administrator, you control who can view or modify data at all times. --- INVENTORY REPORTS View and export your inventory eight ways: by owner, category, storage area, expiration date, power requirements, season, gender, and tradable items. Every report can be printed or saved as a PDF. --- BACKUP & RECOVERY Export your inventory as a CSV or encrypted .prep backup file protected by a 12-word recovery phrase only you know. Optionally push an encrypted backup to the server for an extra layer of protection — our server stores only the encrypted data and can never read it. --- PREP HUB & BIBLE READER Access a library of printable preparedness checklists covering bugout bags, water storage, medical supplies, power, navigation, and more. We believe preparedness goes beyond supplies. The built-in Bible reader — available in King James and Douay-Rheims — is there for the moments when what your family needs most isn't in the pantry. --- Try the app free with Demo Mode — no account required. When you're ready, subscriptions are available monthly, yearly, or as a one-time lifetime purchase. Underground Prepper is an organizational and inventory tool only. It does not provide medical, survival, or safety instructions, and should not be relied upon as your sole source of emergency guidance. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ --- Underground Prepper. Know where you stand.

Screenshots

loomlock4 screens
Underground Prepper4 screens

Verdict

The call

The clearest difference is in-app purchases: loomlock at none against Underground Prepper's 3. Underground Prepper's advantage is update cadence (every 2 days vs every 3 weeks) and device support (4 vs 1). On price and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Underground Prepper sells 3 in-app purchases, starting at $9.99 per month. loomlock asks for nothing beyond the download.

UpkeepUpdate frequency

loomlock ships an update every 3 weeks, Underground Prepper every 2 days. The most recent releases landed on October 30, 2026 and November 9, 2026 respectively.

Scorecard4 real differences · 5 level
loomlock versus Underground Prepper: the parameters behind the verdict, then further details
ParameterloomlockUnderground Prepper
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 3 weeksEvery 2 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhoneiPhone, iPad, iPod, Mac — better
Requires iOS18.615.0 — better
Further details — not scored
Size48 MB93 MB
Age rating17+4+
DeveloperLoomlock Apps5th Studios, LLC

In-app purchases

None

loomlock

No in-app purchases

3 purchases

Underground Prepper

Subscriptions2
  • Monthly Subscription$9.991 Month
  • Yearly Subscription$109.991 Year
One-time1
  • Lifetime Membership$349.99

Questions

Is loomlock free?
loomlock is free to download, with no in-app purchases.
Is Underground Prepper free?
Underground Prepper is free to download, with in-app purchases available.
Do loomlock or Underground Prepper have ads?
Neither loomlock nor Underground Prepper shows ads.
Which is updated more often, loomlock or Underground Prepper?
loomlock ships an update every 3 weeks, and Underground Prepper every 2 days. Most recently, loomlock was updated on October 30, 2026 and Underground Prepper on November 9, 2026.

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