Comparison

Nature Notes vs Gaiaxus

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

Head to head
About

Nature Notes

Record and share notes, photos, and audio from your outdoor adventures. Advanced tools allow for photo merging from other cameras and interactive map integration. Organize trips into multiple hikes and share them via email, web pages, or custom files.

Highlights
  • Record notes, photos, and audio
  • Merge photos from other cameras
  • Interactive Apple Maps integration
  • Organize trips into multiple hikes
  • Share via email, web pages, or files
  • GPS tracking and export (KML/GPX)
Read full description

NatureNotes allows you to record and share notes, photos, and audio recordings on any walk, tour, hike, or just a stroll around your neighborhood. If you are a serious photographer, advanced tools allow you to load pictures from another camera into the walk record. There are several options for sharing walks with friends or other NatureNotes users, including email, Web page creation, or sending a NatureNotes file to another user. Easy sharing: Take photos, save notes, and record audio on your Apple iPhone or iPad. The app offers powerful editing features to create a slideshow or Web folder that you can email to your friends or upload to a server. Interactive maps: Apple maps embedded in NatureNotes shows where you are at all times, as well as where you've been on your hike. Satellite view can show you the terrain with a data connection. If you repeat a hike you've taken before, you can use the interactive map to see where you are relative to your last hike. Organization: Divide your trip into multiple hikes, then put them under a single header. Combine the subsumed hikes into a single slideshow, email, or web folder for sharing. Creating multiple databases offers a system for organizing larger groups of walk records. Records can be copied directly to other databases for easy sorting and reorganization. Photo merging: Take photos with another camera and merge them directly into your NatureNotes recordings. A smart system using dates and timestamps places photos into their correct positions within previously-recorded records. Even without a recorded hike, create a new record from a set of location-encoded photographs, and see exactly where you took the photos, using the embedded Apple Maps features. If the photos contain captions from another photo-editing program, the captions will be copied into NatureNotes titles for immediate labelling within NatureNotes. All slideshow features and email or Web sharing features can then be used with the new records. Create a kml file for viewing the track in another tracking application, or a gpx file for loading a track with GPS data into photo editing applications. GPS tracking: NatureNotes provides detailed tracking data for your walks, regardless of whether you are in cellular range or not. Tracks can be exported as KML or GPX files for use in other applications. Duplication and backups: Take a complete set of records and copy them to another device, with a cable and computer, regardless of record sizes. In this way complete records can be shared or backed-up without loss of information or photographic resolution.

About

Gaiaxus

This app enables users to monitor water quality using a connected sensor, collecting data on temperature, turbidity, salinity, and more. It offers interactive learning modules for environmental education, suitable for students and citizen scientists.

Highlights
  • Real-time water quality data collection
  • Temperature, turbidity, salinity, pH, chlorophyll monitoring
  • Interactive educator-designed learning modules
  • Field data collection and viewing
  • Supports K-12 students, citizen scientists, and researchers
Features
Read full description

The GaiaXus mobile app is a powerful tool for water quality monitoring, designed to engage students and citizen scientists in hands-on environmental education. Paired with the Proteus sensor, the app captures key water quality data like temperature, turbidity, salinity, depth, chlorophyll, and pH, providing a user-friendly platform for field data collection, viewing, and interactive learning through educator-designed “Labs.” While tailored for K-12 students, the app also scales for citizen scientists and researchers, enriching environmental literacy and STEM skills by combining real-world data with collaborative, problem-solving activities.

Screenshots

Nature Notes4 screens
Gaiaxus4 screens

Verdict

The call

The clearest difference is rating: Gaiaxus at 5.0 against Nature Notes's 1.0. Gaiaxus also leads on in-app purchases (none vs 1). Nature Notes's advantage is update cadence (fortnightly vs every 2 months). On price, ratings volume, 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

Both are free to download. Nature Notes sells 1 one-off in-app purchase. Gaiaxus asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Gaiaxus holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

Nature Notes ships an update fortnightly, Gaiaxus every 2 months. Both last shipped on September 24, 2026.

Scorecard4 real differences · 5 level
Nature Notes versus Gaiaxus: the parameters behind the verdict, then further details
ParameterNature NotesGaiaxus
PriceFreeFree
Rating1.0 (1 ratings)5.0 (1 ratings) — better
Number of ratings11
Update frequencyFortnightly — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.515.1 — better
Further details — not scored
Size172 MB75 MB
Age rating4+4+
DeveloperKenneth WahlGaiaXus LLC

Customer experience

Nature Notes

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

Gaiaxus

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Nature Notes

One-time1
  • English$4.99
None

Gaiaxus

No in-app purchases

Questions

Is Nature Notes free?
Nature Notes is free to download, with in-app purchases available.
Is Gaiaxus free?
Gaiaxus is free to download, with no in-app purchases.
Which has better reviews, Nature Notes or Gaiaxus?
Gaiaxus is rated higher. Nature Notes averages 1.0 out of 5 from 1 ratings, while Gaiaxus averages 5.0 from 1 ratings.
Do Nature Notes or Gaiaxus have ads?
Neither Nature Notes nor Gaiaxus shows ads.
Which is updated more often, Nature Notes or Gaiaxus?
Nature Notes ships an update fortnightly, and Gaiaxus every 2 months. Most recently, Nature Notes was updated on September 24, 2026 and Gaiaxus on September 24, 2026.

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