Comparison

GPS Tracker Tool vs Pro Altimeter for Watch

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

Head to head
About

GPS Tracker Tool

This tool provides remote control for dedicated hardware GPS trackers, drafting SMS commands and offering navigation assistance. It supports multiple trackers, geo-fencing, and reverse geocoding, with optional in-app purchases for live tracking features.

Highlights
  • Drafts SMS commands for trackers
  • Built-in compass for navigation
  • Cell triangulation fallback
  • Reverse geocoding
  • Manage multiple trackers
  • Visual geo-fence setup
  • Configurable unit system
Features
Read full description

More infos at gps-tracker-tool.de (support url). WHAT IT'S NOT - You can NOT track other phones with this app! This is a "remote control" for one of the dedicated hardware GPS trackers from the list of compatible models. - You cannot send SMS from iPod/iPad devices. However, you can still use the LIVE tracking features. MAJOR FEATURES - app will draft SMS commands for you - no need to carry around the tracker's manual - built-in compass for off-road navigation to tracker location - offers cell triangulation as fallback - reverse geocoding - administration of multiple trackers - visual set-up of geo-fence - configurable unit system (mi, km/h – m, ft) - quick commands = easy accessible custom commands - in-app purchases to enable the LIVE tracking features for some models: Trip history, trip start & end alerts, speed alert, geo fences, KML export INCOMING SMS You just copy the whole incoming SMS and switch to the app. It will then try to match it against known formats. All data can then usually be visualized on the map. Please understand that iOS DOES NOT ALLOW to intercept incoming SMS automatically! Some tracker models can be monitored via the internet. SUPPORTED TRACKER MODELS Anywhere (TK 108), Asta (EV07S*), ELRO (GPS1), Concox (GT02, GT011, GT 100), Incutex (TK 5000*, TK 104, TK 105*, TK 106, TK 116), meitrack (VT 310 v6, VT 310 v7), PAJ* (Allround, Easy, Gold, Motorcycle, Mini, Personal, Power, Professional), Simvalley (GT 60, GT 170, GT 280), TKstar* (Bike, 720, 816 OBD, 901, 905, 909, 915), Toplovo (TL 202), Wonde Proud (SPT 10, VT 10), Xexun* (TK 101, TK 102, TK 102-2, TK 102v6, TK 103, TK 103-2, TK 104, TK 106, TK 201, TK 201-2, TK 202, TK 203, TK 206, XT 009) * InApp live tracking via Internet for these models possible. After you made the tracker connect to the server, the feature can be activated with an InApp purchase. Model names might not always be unique amongst manufacturers, so if your tracker came with a manual, you can check for compatibility here: https://gps-tracker-tool.de/compatibility/ (see also support-url) KNOWN PROBLEMS - Please note that while you can send iMessages, you cannot send SMS from an iPad or iPod and therefore you would have very limited functionality on these devices. Still, an iPad would be a good choice for the LIVE tracking part. - Since iOS 10, short messages which contain links will be broken up into two. This makes copying a whole message impossible. You might have to miss out on the app's ability to visualize an incoming message from certain trackers. (If you experience any problem or have a feature request, please send us an e-mail. You find the address in the app's help section.)

About

Pro Altimeter for Watch

This app provides precise altitude readings using your Apple Watch's barometric pressure sensor. It offers multiple calibration methods, including GPS, manual entry, and airport data, ensuring accurate measurements for outdoor activities. The interface is designed for easy readability with customizable color schemes.

Highlights
  • Barometric pressure sensor utilization
  • GPS altitude display
  • Multiple calibration methods (GPS, manual, airport data)
  • Real-time accuracy estimates
  • Customizable color schemes
  • Calibration reminders
Features
Currently charting
Read full description

Pro Altimeter for Watch is the newest Watch app from Hunter Research, developer of the popular outdoors app Theodolite. Pro Altimeter uses the high-fidelity barometric pressure sensor in the Apple Watch to measure and compute altitude. Although this is a Watch app, it has the same features, capabilities, and accuracy as the Pro Altimeter app for iPhone and iPad, just in a smaller form factor on your wrist! Pro Altimeter has a dead simple interface. Barometric altitude and GPS altitude are displayed in large easy to read numbers, with available units of feet or meters, and realtime accuracy estimates from the hardware. At bottom are calibration and settings buttons. The display offers highly-readable color schemes of luminescent green on black, white on black, and midnight red on black. Proper calibration is necessary to measure altitude from barometric pressure (this is why a pilot "dials in" the cockpit altimeter before taking off). Pro Altimeter offers numerous methods for calibration -- choose the easiest and most convenient: 1. Use GPS altitude. This method correlates the measured local barometric pressure with the altitude measured by GPS. This method can be used when your device has a clear line of sight to the sky and a reliable GPS fix with good accuracy that you trust. 2. Manually enter altitude in feet or meters. This method correlates the measured local barometric pressure with known altitude from landmarks, elevation benchmarks, trail markers, topo maps, land surveys, etc. 3. Manually enter pressure. If you have a weather station, weather report, or METAR report with equivalent sea level pressure for a nearby location, this can be used to correlate local barometric pressure to altitude. Pressure can be entered with units of inches Hg, kPa, or mb. 4. Check local airports. With the tap of a button, Pro Altimeter will locate the five closest airports within 100 miles (160km) of your present location anywhere in the world, and pull in METAR data. From that list of five, pick the airport of your choice and Pro Altimeter will import pressure data for calibration. Once calibrated, Pro Altimeter keeps track of the time since its last calibration. Because weather and local barometric pressure change over time, the app will warn you when 6 hours have elapsed since the last calibration by flashing the "CAL" button. You should calibrate as frequently as practical -- for example, on a hike, calibrate whenever you pass a trail marker or elevation benchmark, or hourly. But at a minimum, calibrate at least every 6 hours or whenever weather changes in your area. Pro Altimeter runs on all Apple Watch models running watchOS 9.6 or later. NOTE: The app requires user permission to access Location Services and Motion & Fitness in order to operate properly.

Screenshots

GPS Tracker Tool4 screens

Verdict

The call

The clearest difference is review sentiment: GPS Tracker Tool at 80% against Pro Altimeter for Watch's 44%. GPS Tracker Tool also leads on update cadence (every 5 weeks vs every 7 months) and rating (4.5 vs 4.3). Pro Altimeter for Watch's advantage is in-app purchases (none vs 4) and price ($0.99 vs $6.99). On 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

GPS Tracker Tool costs $6.99 and Pro Altimeter for Watch $0.99 up front. GPS Tracker Tool sells 4 one-off in-app purchases. Pro Altimeter for Watch asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

GPS Tracker Tool holds the better App Store score, 4.5 against 4.3. Both are backed by a comparable volume of ratings — 14 and 4 respectively. Written reviews point the same way: 80% of GPS Tracker Tool's written reviews are positive against 44% of Pro Altimeter for Watch's.

UpkeepUpdate frequency

GPS Tracker Tool ships an update every 5 weeks, Pro Altimeter for Watch every 7 months. Both last shipped on October 29, 2026.

Scorecard9 real differences · 2 level
GPS Tracker Tool versus Pro Altimeter for Watch: the parameters behind the verdict, then further details
ParameterGPS Tracker ToolPro Altimeter for Watch
Price$6.99$0.99 — better
Rating4.5 (14 ratings) — better4.3 (4 ratings)
Positive reviews79.8% of reviews — better44.4% of reviews
Number of ratings14 — better4
Update frequencyEvery 5 weeks — betterEvery 7 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
Best chart rank—#156 — better
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPod, Apple Watch
Requires iOS13.0 — better15.6
Further details — not scored
Size8 MB1 MB
Age rating4+4+
DeveloperMichael HoerethCraig Hunter

Customer experience

GPS Tracker Tool

All ratings14 ratings
Positive85.7%
Neutral14.3%
Negative0.0%
Written reviews109 reviews
Positive79.8%
Neutral3.7%
Negative16.5%

Pro Altimeter for Watch

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews9 reviews
Positive44.4%
Neutral11.1%
Negative44.4%

In-app purchases

4 purchases

GPS Tracker Tool

One-time4
  • One Month$1.99
  • One Quarter$4.99
  • Half-Year$8.99
Show 1 more
  • One Year$15.99
None

Pro Altimeter for Watch

No in-app purchases

Questions

Is GPS Tracker Tool free?
GPS Tracker Tool costs $6.99, and also offers in-app purchases.
Is Pro Altimeter for Watch free?
Pro Altimeter for Watch costs $0.99, with no in-app purchases.
Which has better reviews, GPS Tracker Tool or Pro Altimeter for Watch?
GPS Tracker Tool is rated higher. GPS Tracker Tool averages 4.5 out of 5 from 14 ratings, while Pro Altimeter for Watch averages 4.3 from 4 ratings.
Do GPS Tracker Tool or Pro Altimeter for Watch have ads?
Neither GPS Tracker Tool nor Pro Altimeter for Watch shows ads.
Which is updated more often, GPS Tracker Tool or Pro Altimeter for Watch?
GPS Tracker Tool ships an update every 5 weeks, and Pro Altimeter for Watch every 7 months. Most recently, GPS Tracker Tool was updated on October 29, 2026 and Pro Altimeter for Watch on October 29, 2026.

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