Comparison

Large Maps vs Topo Lock Maps

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

Head to head
About

Large Maps

View and scroll extremely large PDF, TIFF, JPEG, or PNG map files with ease. This app handles documents up to 110 inches wide, offering fast, offline viewing without internet access. It also functions as a general-purpose PDF reader and can view faxes.

Highlights
  • View large map files (PDF, TIFF, JPEG, PNG)
  • Handles documents up to 110 inches wide
  • Fast, effortless offline viewing
  • Integrated passive caching Dropbox support
  • General purpose lightning fast PDF reader
  • Can read faxes
Features
Read full description

Got a PDF of a topographical map? Is that map 110 x 80 inches. None of the document readers in the App store can view and scroll your map with ease? We can, we are happy to work with Map files that are as large as 110 inches or 3 meters wide. Say for example the USA Forestry Service Maps at http://www.fs.fed.us/maps which are 80 by 110 inches unfolded. Other PDF readers optimized for 8.5 by 11 inch page sizes just crash and burn when given such a map, or scrolling becomes ugly. Many governments like Canada provide free maps http://atlas.nrcan.gc.ca Or as an expert use http://mapbox.com to create your own specialized maps. Note we don't supply the Maps you must find those, in PDF, TIFF or JPEG/PNG formats, but once you have them, then you can view them with ease. True off line viewing, no internet needed once you have given us the Map So bring your OWN Maps for true, fast, effortless off-line viewing. Remember 24 hour support is available from the Support button! We use our accelerated PDF viewing logic, and combined with our TIFF decoder we can deal most image formats. Expanding on our LargeViewer technology then means size is not a problem. *** Bonus *** because of that we are a general purpose lightning fast PDF Reader, and can read FAXES too. So we are many apps in one. With our integrated passive caching Dropbox Support you can host maps on your Dropbox account then read them from all your iOS devices, even when you don't have internet access. Don't forget our OS-X helper app for LargeViewer

About

Topo Lock Maps

This app provides private and secure outdoor navigation with end-to-end encryption. It focuses on user privacy, offering offline maps without tracking or data mining. Enjoy a distraction-free experience designed for various outdoor activities.

Highlights
  • End-to-end encryption
  • No ads or tracking
  • Offline maps with no expiration
  • Fast offline downloads
  • Local and offline first performance
  • Battery friendly optimization
Features
Read full description

Your location is personal... Your maps should be too! Topo Lock Maps is your trusted companion for private, secure outdoor navigation. Whether it’s a hidden waterfall, your favorite hunting spot, a backcountry trail run, or a private gate code... your information stays yours. In a world driven by tracking and data collection, Topo Lock Maps takes a different approach. We believe your outdoor adventures should remain private, secure, and fully under your control. -- Features -- - End-to-End Encryption — Your map data stays private and secure. - No Ads. Ever. — Enjoy a clean, distraction-free experience. - No Tracking or Data Mining — We don’t monitor where you go. - No Social Media Integrations — Your outdoor life isn’t content for someone else’s feed. - You Own Your Data — No selling, no sharing, no surprises. - Offline Maps That Work — Download once and keep them. No expiration. - Fast Offline Downloads — Save maps quickly and head out with confidence. - Local & Offline First — Built to perform off the grid. - Lightning-Fast Performance — Quick, responsive maps, even in remote areas. - Battery Friendly — Optimized to conserve power on long adventures. -- Made Especially For -- Hikers, hunters, mountain bikers, game wardens, fishermen, trail runners, privacy enthusiasts, backpackers, scouts and troops, bird watchers, wilderness first responders, search and rescue teams, off-roaders, police officers, trail maintainers, private investigators, world travelers, arrowhead hunters, preppers, park rangers, thru-hikers. -- Thanks -- Thanks to everyone who uses Topo Lock Maps in the backcountry and please continue to provide feedback! More features coming down the trail!

Screenshots

Large Maps4 screens
Topo Lock Maps4 screens

Verdict

The call

The clearest difference is price: Topo Lock Maps at Free against Large Maps's $7.99. Topo Lock Maps also leads on review sentiment (100% vs 64%) and update cadence (fortnightly vs every 5 weeks). Large Maps's advantage is in-app purchases (none vs 2) and iOS requirement (12.0 vs 17.0). On rating, ads and device support 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

Topo Lock Maps is free to download; Large Maps costs $7.99 up front. Topo Lock Maps sells 2 in-app purchases, starting at $9.99 per month. Large Maps asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Large Maps against 5.0 for Topo Lock Maps. That said, the two scores are not equally well evidenced: Topo Lock Maps has 6 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 64% of Large Maps's written reviews are positive against 100% of Topo Lock Maps's.

UpkeepUpdate frequency

Large Maps ships an update every 5 weeks, Topo Lock Maps fortnightly. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

Scorecard7 real differences · 3 level
Large Maps versus Topo Lock Maps: the parameters behind the verdict, then further details
ParameterLarge MapsTopo Lock Maps
Price$7.99Free — better
Rating5.0 (1 ratings)5.0 (6 ratings)
Positive reviews64.3% of reviews100.0% of reviews — better
Number of ratings16 — better
Update frequencyEvery 5 weeksFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFreemium — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better17.0
Further details — not scored
Size64 MB19 MB
Age rating4+4+
DeveloperCorporate Smalltalk Consulting LtdVonCannon Technology, Incorporated

Customer experience

Large Maps

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews14 reviews
Positive64.3%
Neutral7.1%
Negative28.6%

Topo Lock Maps

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Large Maps

No in-app purchases

2 purchases

Topo Lock Maps

Subscriptions2
  • Pro Monthly7 Days trial$9.991 Month
  • Pro Yearly7 Days trial$99.991 Year

Questions

Is Large Maps free?
Large Maps costs $7.99, with no in-app purchases.
Is Topo Lock Maps free?
Topo Lock Maps is free to download, with in-app purchases available.
Which has better reviews, Large Maps or Topo Lock Maps?
Large Maps and Topo Lock Maps are both rated 5.0 out of 5 on the App Store, from 1 and 6 ratings respectively.
Do Large Maps or Topo Lock Maps have ads?
Neither Large Maps nor Topo Lock Maps shows ads.
Which is updated more often, Large Maps or Topo Lock Maps?
Large Maps ships an update every 5 weeks, and Topo Lock Maps fortnightly. Most recently, Large Maps was updated on October 23, 2026 and Topo Lock Maps on October 24, 2026.

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