Avenza Maps alternative
A free, open-source Avenza Maps alternative
Avenza Maps is the app most field crews reach for when they have a georeferenced PDF or GeoTIFF to carry into the backcountry. It is genuinely good at that job. But the free tier caps you at three imported maps, and lifting that cap means a $49.99/yr Plus subscription (or $169.99/yr for Pro).
Avenza Maps vs mapper.one at a glance
Avenza is free for 3 imported maps; Plus is $49.99/yr (20 maps) and Pro starts at $169.99/yr. mapper.one is free with unlimited imports.
| Feature | Avenza Maps | mapper.one |
|---|---|---|
| Price | Free (3 maps); Plus $49.99/yr; Pro $169.99/yr | Free |
| Imported map limit | 3 free / 20 on Plus | Unlimited |
| Import formats | Geo-PDF, GeoTIFF, KML (+shapefile on Pro) | KML, KMZ, GeoJSON, GPX |
| Offline basemap tiles | Your imported maps / Map Store | OpenStreetMap, cached offline |
| Waypoints with notes & photos | Yes | Yes |
| Route follow + off-route alerts | Limited | Yes, with voice alerts |
| Account required | Yes | No |
| Open source | No | Yes |
Pricing reflects publicly listed rates and can change; check each vendor for current pricing.
Why people look for an alternative
mapper.one was built as a mobile-first replacement for exactly this workflow: import your own map data on your phone, cache it for offline use, and drop waypoints in the field — without a per-map limit and without a subscription. It is free and open-source.
What Avenza Maps does well
- Best-in-class support for georeferenced PDF and GeoTIFF map packs — the format most agencies and the Avenza Map Store distribute.
- A large Map Store catalog of ready-made topo and recreation maps you can buy and download.
- Mature Pro features: shapefile import, Bluetooth high-accuracy external GPS, and converting tracks to areas.
- Years of field use behind it across surveying, forestry, and SAR.
Where mapper.one is different
- Unlimited map imports on the free tier — no 3-map ceiling and no subscription to lift it.
- Imports KML, KMZ, GeoJSON, and GPX directly on the phone (no desktop conversion step).
- Offline OpenStreetMap tile caching so the basemap itself works with no signal, not just your overlays.
- Open-source and account-free — your data stays on your device.
Which should you use?
Where Avenza Maps still wins
Stay with Avenza if your workflow is built around georeferenced PDF/GeoTIFF map packs or the Avenza Map Store catalog, or if you need its Pro-only shapefile and Bluetooth-GPS support. mapper.one focuses on vector data (KML/GPX/GeoJSON) and OSM basemaps rather than raster PDF map packs.
When to choose mapper.one
Switch to mapper.one if you import your own KML, GPX, or GeoJSON, want unlimited maps without paying yearly, and need the basemap cached for true offline use.
Frequently asked questions
Is mapper.one really free?
Yes. mapper.one is free and open-source, with no subscription and no per-map limit. Optional donations help fund development, but every feature is available to everyone.
Can it open my Avenza KML or GPX files?
Yes. You can import KML, KMZ, GeoJSON, and GPX directly on your phone. Georeferenced PDF/GeoTIFF map packs are an Avenza specialty that mapper.one does not import — it uses OpenStreetMap basemaps plus your vector data instead.
Does it work with no cell service?
Yes. Map tiles you have viewed are cached to durable device storage, so saved regions render fully offline — that is the core use case.
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Read comparison →Trustworthy maps for the wild places
mapper.one is free, open-source, and built to work where there is no signal. Carry your own data into the field.