HerpMapper vs CTT Mobile
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HerpMapper
Record reptile and amphibian observations with photos, sounds, and GPS locations. Your data supports scientific research and conservation efforts globally. Access your findings online and contribute to a shared database.
- Record observations with photos and sound
- Automatic GPS location tagging
- Offline recording capability
- Searchable herpetofauna database
- Data contribution to research and conservation
- View records on the HerpMapper website
Read full descriptionHide full description
HerpMapper is a 501(c)(3) nonprofit organization designed to gather and share information about reptile and amphibian observations across the planet. Using the HerpMapper mobile app, you can create records of your herp observations and keep them all in one place. In turn, your data is made available to HerpMapper Partners – groups who use your recorded observations for research, conservation, and preservation purposes. Your observations can make valuable contributions on the behalf of amphibians and reptiles. Using your phone’s camera and GPS capabilities, the HerpMapper mobile app creates a ‘voucher record’ of your find, incorporating photos of the animal, and recording the location. For calling frogs and toads, the app enables you to record and include a sound file in a record. The date and time of day are also recorded. The app features a searchable database of the common and scientific names for all of the world’s herpetofauna, and you can search for either type of name by entering just a fragment. The newest version of the app allows you to add multiple photos and soundfiles to a record The HerpMapper mobile app does not require wireless or cellular service in order to properly record locations - it uses your phone’s native GPS device, which remains in satellite contact when outside (many HerpMapper records have been recorded in remote corners of the globe). Once you are back in wireless or cellular range, you can upload (sync) your collected records to the HerpMapper database. Once uploaded, you can view any and all of your records from the HerpMapper website (www.herpmapper.org). Creating a HerpMapper account is fast, simple, and free, and you can use the site and the mobile app to keep track of your finds, build a life list, and contribute to science and herp conservation! Instructions for creating an account, and installing and using the mobile app, are listed on the HerpMapper website. Who can see the records you create? There are two levels of visibility for records. Only you and HerpMapper Partners have access to all of the data in the records you create. Other users of HerpMapper and the general public can only see very basic information in your records – they do not have access to exact locality data. Any pictures attached to a record have their locality metadata stripped, so they can be seen by everyone on the HerpMapper website, which means you can also see the cool herps being recorded by other people from around the world. Who are HerpMapper's Partners? For the most part, they are biologists working for state or regional agencies, university researchers, or conservation organizations across the globe. A list of HerpMapper Partners is maintained on the HerpMapper website.
CTT Mobile
Monitor real-time telemetry from your CTT devices. Adjust device duty cycles and connect to Bluetooth-enabled products like the Sidekick and Node Version 3.
- View latest telemetry data
- Assign device duty cycle changes
- Connect to Bluetooth enabled CTT products
- Monitor Sidekick and Node Version 3
Read full descriptionHide full description
CTT Mobile allows you to view the latest telemetry data from your CTT devices on your mobile device. In addition you can use CTT Mobile to assign device duty cycle changes and connect to Bluetooth enabled CTT products such as the Sidekick and Node Version 3.
Screenshots
Verdict
The clearest difference is review sentiment: CTT Mobile at 100% against HerpMapper's 42%. CTT Mobile also leads on rating (5.0 vs 3.5) and iOS requirement (13.0 vs 15.0). HerpMapper's advantage is ratings volume (24 vs 7). On price, update cadence, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
CTT Mobile holds the better App Store score, 5.0 against 3.5. Both are backed by a comparable volume of ratings — 24 and 7 respectively. Written reviews point the same way: 42% of HerpMapper's written reviews are positive against 100% of CTT Mobile's.
HerpMapper ships an update every 3 months, CTT Mobile every 2 months. The most recent releases landed on June 1, 2026 and June 20, 2026 respectively.
| Parameter | HerpMapper | CTT Mobile |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (24 ratings) | 5.0 (7 ratings) — better |
| Positive reviews | 41.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 24 — better | 7 |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 67 MB | 59 MB |
| Age rating | 4+ | 4+ |
| Developer | Donald Becker | Cellular Tracking Technologies LLC |
Customer experience
HerpMapper
CTT Mobile
In-app purchases
HerpMapper
No in-app purchases
CTT Mobile
No in-app purchases









