EVChargingOrGas vs Call a Satellite
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
EVChargingOrGas
Read full descriptionHide full description
As a plug-in car owner, I often have a question, shall I charge or fuel my car base on different electric rate and gas price. This app is for every plug-in hybrid driver's dilemma. When park somewhere for hours but charging is not free, shall I charge my car? This app precisely calculates your charging costs with specific electric rates and full battery size, and estimates fuel expenses based on distance and your car's MPG. Simplify your drive and budget better with ChargeOrGas, your go-to for making cost-effective travel decisions.
Call a Satellite
Communicate with orbiting satellites, including the International Space Station, through voice or text. Track their real-time positions and receive mission details and telemetry. Get predictions and alerts for visible satellite passes.
- Voice and text communication with satellites
- Live satellite tracking with ground visualization
- Real-time orbital telemetry data
- ISS pass predictions and notifications
- Multiple satellite profiles
- Immersive dark UI for stargazing
Read full descriptionHide full description
Call a Satellite lets you track and talk to satellites orbiting Earth. Pick a satellite from the live list — including the International Space Station — tap Call, and start speaking. The satellite responds with its own voice, describing what it sees, its current mission, and telemetry data in real time. FEATURES • Voice & Text Communication — Hold to speak using your microphone, or type a message. The satellite replies with synthesized speech and text. • Live Satellite Tracking — Watch the ISS move across a real-time map with ground track visualization. See altitude, velocity, and position update as you talk. • Real Telemetry — Altitude, velocity, latitude, and longitude are pulled from actual orbital data, not simulated. • ISS Pass Predictions — Get predictions for when the ISS will be visible from your location in the next 24 hours, with elevation and duration details. • Pass Notifications — Set alerts so you never miss a visible ISS flyover. • Multiple Satellites — Browse and call different spacecraft, each with its own mission profile. • Immersive Dark UI — Designed for stargazing. Pure black backgrounds, clean typography, and a mission-control aesthetic. Call a Satellite uses real orbital mechanics (SGP4 propagation) and live TLE data to track spacecraft. Voice input uses on-device speech recognition. Satellite responses are generated by AI. Built for space enthusiasts, amateur radio operators, students, and anyone who has ever looked up and wondered what it would be like to talk to something in orbit.
Screenshots
Verdict
The clearest difference is device support: EVChargingOrGas at 2 against Call a Satellite's —. Call a Satellite's advantage is iOS requirement (15.1 vs 17.4). On price 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.
| Parameter | EVChargingOrGas | Call a Satellite |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (3 ratings) — better |
| Number of ratings | — | 3 — better |
| Ads | No | — |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad — better | — |
| Requires iOS | 17.4 | 15.1 — better |
| Further details — not scored | ||
| Size | 4 MB | 42 MB |
| Age rating | 17+ | 9+ |
| Developer | Junyi Wang | Aditya Upadhyay |
In-app purchases
EVChargingOrGas
No in-app purchases
Call a Satellite
No in-app purchases
Questions
Is EVChargingOrGas free?
Is Call a Satellite free?
Other comparisons















