Clue Tracker for Letterboxing vs FlashInvaders
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Clue Tracker for Letterboxing
This app helps letterboxing enthusiasts find and track their finds. It allows users to locate nearby letterboxes, view detailed information, record finds, and organize custom itineraries. Save clues and box details for offline access and share lists with other users.
- Find nearby letterboxes
- Search by location, name, ID
- View detailed box information
- Map view with directions
- Record finds
- Offline clue storage
- Organize custom itineraries
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Clue Tracker is the ultimate letterboxing app. Quickly and easily find Atlas Quest and LbNA boxes, view maps, record finds, save and organize itineraries of letterboxes and much more. Features: • Find nearby letterboxes based on your current location. • Search for boxes by location, box name, planter, box ID, and much more. • View detailed letterbox information including last found date, series details, and comments. • Show letterboxes on a map and get directions to a box. • Built-in compass display (device support required). • Quickly and easily record finds. • Save clues and other letterbox information for offline use. • Organize saved letterboxes into your own lists and reorder boxes to create custom itineraries. • Share a list of saved letterboxes with another Clue Tracker user (or transfer the list to another device). • Sort and filter search results and lists of saved letterboxes. • Change the location of a saved letterbox. • Add Word-Of-Mouth (WOM) letterboxes. • Add your own photos to saved boxes and WOM boxes. • Add personal notes. Are you new to Letterboxing? Learn more about this intriguing activity at AtlasQuest.com or Letterboxing.org. Pearl Crescent and Clue Tracker are not affiliated with Atlas Quest or LbNA.
FlashInvaders
Discover and document street art mosaics globally. Scan artwork to add it to your personal gallery, earn points, and track your progress. Share your finds and compete with friends.
- Discover street art mosaics
- Scan and document artwork
- Personal mosaic gallery
- Share discoveries on social media
- Follow friends' scores
- Live worldwide flash stream
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FlashInvaders is the official application of the artist Invader. Go and search for his thousands mosaics all around the world, flash them and get points. - Valid flashes are added to your own gallery where you can find all the mosaics you have found anytime. - You can also share your discoveries on social networks. - Create your followers list and follow your friends' scores. - Follow the live stream to see all the flashes in real time worldwide.
Screenshots
Verdict
The clearest difference is price: FlashInvaders at Free against Clue Tracker for Letterboxing's $6.99. FlashInvaders also leads on iOS requirement (12.0 vs 15.0). Clue Tracker for Letterboxing's advantage is update cadence (every 2 months vs every 11 months) and chart position (#110 vs unranked). On rating, review sentiment, ratings volume 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
FlashInvaders is free to download; Clue Tracker for Letterboxing costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.
FlashInvaders holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 598 and 907 respectively. Written reviews point the same way: 74% of Clue Tracker for Letterboxing's written reviews are positive against 77% of FlashInvaders's.
Clue Tracker for Letterboxing ships an update every 2 months, FlashInvaders every 11 months. Both last shipped on October 26, 2026.
| Parameter | Clue Tracker for Letterboxing | FlashInvaders |
|---|---|---|
| Price | $6.99 | Free — better |
| Rating | 4.7 (598 ratings) | 4.9 (907 ratings) — better |
| Positive reviews | 74.1% of reviews | 76.6% of reviews — better |
| Number of ratings | 598 | 907 — better |
| Update frequency | Every 2 months — better | Every 11 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Best chart rank | #110 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Pearl Crescent | flash invaders |
Customer experience
Clue Tracker for Letterboxing
FlashInvaders
User reviews
Clue Tracker for Letterboxing
From 598 App Store ratingsWhat we love
- 🗺️ Excellent map feature for locating boxes
- 👍 User-friendly and intuitive interface
- 📱 Convenient offline access to saved clues
- 🔄 Integrates both AtlasQuest and LBNA databases
- 🚀 Fast and efficient nearby search functionality
Room to improve
- 🐛 Incomplete database coverage (missing many boxes)
- 🔐 Login/password reset issues
- 📍 Map location accuracy problems
- 🔍 Search function limitations and inaccuracies
- 💰 High price point for app
FlashInvaders
From 907 App Store ratingsWhat we love
- 👍 Fun and engaging app
- 🚀 Great for exploring cities
- 👾 Clever concept
- 💥 Motivates users to discover art
- 🌍 Encourages travel and discovery
Room to improve
- 🐛 Validation/recognition issues
- 🚫 Inability to upload existing photos
- 🤖 Glitchy and unreliable
- 🚫 Accounts getting banned/blocked
Bugs and requests
Clue Tracker for Letterboxing
Reported bugs
9 issues- Login password reset option missing
- Incomplete database results (only shows partial box listings)
- Map location coordinates significantly inaccurate (off by 10+ miles)
- Search results limited to 50 boxes
- Numeric box name searches converted to box number searches
Show 4 moreShow fewer
- Geographic location search returns wrong areas
- Atlas Quest support not functional in some versions
- Clue text doesn't fit screen properly (requires horizontal scrolling)
- Boxes marked active but not actually found in field
Requested features
10 requests- Search by box name functionality
- Search by box number capability
- Ability to manually adjust pin locations on personal map
- Display of last found date for boxes
- View other users' logs and comments
Show 5 moreShow fewer
- Filter to hide retired or lost boxes
- Better text scaling for longer clues
- More detailed search criteria options
- In-app note-taking feature
- Direct logging from app without external browser
FlashInvaders
Reported bugs
4 issues- Camera not working
- Login/sign-up issues
- Crashes and black screens
- Inability to restore lost galleries
Requested features
5 requests- Ability to upload existing photos
- Improved validation and recognition
- Geolocation support for damaged invaders
- Higher zoom levels
- More invaders in different regions
In-app purchases
Clue Tracker for Letterboxing
No in-app purchases
FlashInvaders
No in-app purchases
Questions
Is Clue Tracker for Letterboxing free?
Is FlashInvaders free?
Which has better reviews, Clue Tracker for Letterboxing or FlashInvaders?
Do Clue Tracker for Letterboxing or FlashInvaders have ads?
Which is updated more often, Clue Tracker for Letterboxing or FlashInvaders?
Other comparisons
