Comparison

Coverage Map vs SundialEV

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

Head to head
About

Coverage Map

This app provides a crowdsourced map of cellular network performance and coverage across the US, Canada, UK, and Puerto Rico. Users can view real-time speed test data, compare carrier performance, and check signal strength in specific areas. It also includes a built-in speed test to contribute to the map.

Highlights
  • Crowdsourced speed test map
  • Real-time performance data
  • Download, upload, and latency details
  • Carrier and network type filters
  • Built-in speed test functionality
  • Signal strength mapping (US only)
  • Data-driven coverage reports (US only)
Features
Read full description

Coverage Map helps you find the #1 cell phone carrier in your area. It is a crowdsourced map of cellular networks in the US, Canada, United Kingdom, and Puerto Rico with more countries launching soon. SPEED TEST MAP (All Countries) • Highly accurate: see real-world performance reported by users • Real-time: map updates in real-time as new data comes in • Rich detail: tap any square to see download speeds, upload speeds, and latency for all carriers in that area • Powerful filters: filter by carrier, LTE/5G, download speeds, upload speeds, or see your speed tests only • Helpful color profiles: default, heat map, and best carrier help you visualize and understand the data • Easy to understand: see what carrier performs best in an area at a glance with the Best Carrier color profile BUILT-IN SPEED TEST (All Countries) • Test your speeds: see how fast your LTE or 5G connection is by running a speed test • Accurate results: get accurate results for download speed, upload speed, and latency • Recurring tests: run up to 500 recurring tests automatically and customize the pause duration between tests • Set a data limit: limit how much data the app can use • Tag your tests: tag a test as indoor, outdoor, driving, or other • Improve the Speed Map: running a speed test automatically contributes to the fastest-growing crowdsourced map of cellular networks (note: if your country is not currently supported, when we do launch in your country all of your tests will instantly be mapped and will show up on the map) SIGNAL STRENGTH MAP (US only) • Check reception: see where each carrier has great, good, or poor coverage • Compare coverage footprints: toggle between carriers to see how coverage footprints compare in different areas • Data for every location: the Signal Strength Map uses data from the FCC Broadband Collection, which has coverage data for the continental U.S., Alaska, and Hawaii COVERAGE REPORT MAP (US only) • Data-driven reports: the Coverage Report Map aggregates all available data points to generate detailed reports of cellular coverage & performance in every state, county, city, and ZIP code • Percentage covered: see what percentage of an area each carrier covers • Weighted median: see weighted median values for download speed, upload speeds, and latency for a better picture of real-world cellular performance • Carrier rankings: see what carrier ranks best for coverage, speed, reliability, and overall performance in every area • Distribution graphs: see the distribution graphs for download speeds, upload speeds, and latency • Performance by time of day: see how data speeds vary over the course of day as network traffic picks up Terms of Use and Privacy Policy: https://coveragemap.com/privacy-policy

About

SundialEV

This app intelligently directs surplus solar energy to charge your electric vehicle instead of sending it back to the grid. It helps users save money by avoiding high electricity buy-back rates and utilizing cheaper off-peak charging times. The system is designed for a set-and-forget experience, integrating with existing EV and solar hardware.

Highlights
  • Charges EV with surplus solar
  • Avoids grid export for low rates
  • Set charging floor and battery reserve
  • Works with all Tesla models
  • Coordinates with Powerwall
  • Utilizes off-peak charging
Features
Read full description

Your rooftop solar is worth far more in your car than sold back to the grid. SundialEV automatically charges your EV from surplus solar instead of exporting it for pennies — set it once and forget it. Under "Net billing" electric plans (like NEM 3.0), utilities pay you a few cents for the solar you export, then charge you full price for the same energy at night. Sundial closes that gap: when your panels make more than your home needs, it sends the surplus to your car instead of the grid, saving most users on their electricity bills. • Set-and-forget — pick a charging floor and a battery reserve once; Sundial does the rest • Works with every Tesla model — and with any EV brand via an OCPP smart wall charger, like the Wallbox Pulsar Plus • Reads your production from Tesla, SolarEdge, Enphase solar systems (+ more now) • Coordinates with your Powerwall — you choose how full it gets before the car charges • Tops up on cheap off-peak power on your schedule, and avoids peak-rate windows when solar isn't available • Need range right now? One tap starts a full-speed charge — solar takes back over when it's done • No new hardware — works with the solar, battery, car, and charger you already own

Screenshots

Coverage Map4 screens
SundialEV4 screens

Verdict

The call

The clearest difference is ads: SundialEV at none against Coverage Map's shown. SundialEV also leads on review sentiment (100% vs 68%) and monetization model (free vs free with in-app purchases). Coverage Map's advantage is ratings volume (798 vs 11) and device support (3 vs 1). On price, in-app purchases and iOS requirement 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

SundialEV holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Coverage Map has 798 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 68% of Coverage Map's written reviews are positive against 100% of SundialEV's.

UpkeepUpdate frequency

Coverage Map ships an update fortnightly, SundialEV every 5 days. The most recent releases landed on October 13, 2026 and October 11, 2026 respectively.

Scorecard7 real differences · 3 level
Coverage Map versus SundialEV: the parameters behind the verdict, then further details
ParameterCoverage MapSundialEV
PriceFreeFree
Rating4.7 (798 ratings)5.0 (11 ratings) — better
Positive reviews67.6% of reviews100.0% of reviews — better
Number of ratings798 — better11
Update frequencyFortnightlyEvery 5 days — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better16.4
Further details — not scored
Size69 MB42 MB
Age rating4+4+
DeveloperCoverage Map LLCAppAhead

Customer experience

Coverage Map

All ratings798 ratings
Positive92.2%
Neutral2.5%
Negative5.3%
Written reviews136 reviews
Positive67.6%
Neutral10.3%
Negative22.1%

SundialEV

All ratings11 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Coverage Map

Reported bugs

4 issues
  • Frequent crashes when viewing maps
  • Speed test failures and timeouts
  • Inconsistent speed test results
  • Incorrect location detection

Requested features

5 requests
  • Low data mode
  • Offline coverage map downloads
  • Ability to set test duration and frequency
  • Display cell tower locations
  • Expand to international coverage

SundialEV

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Coverage Map

No in-app purchases

None

SundialEV

No in-app purchases

Questions

Is Coverage Map free?
Coverage Map is free to download, with no in-app purchases.
Is SundialEV free?
SundialEV is free to download, with no in-app purchases.
Which has better reviews, Coverage Map or SundialEV?
SundialEV is rated higher. Coverage Map averages 4.7 out of 5 from 798 ratings, while SundialEV averages 5.0 from 11 ratings.
Do Coverage Map or SundialEV have ads?
Coverage Map shows ads; SundialEV does not.
Which is updated more often, Coverage Map or SundialEV?
Coverage Map ships an update fortnightly, and SundialEV every 5 days. Most recently, Coverage Map was updated on October 13, 2026 and SundialEV on October 11, 2026.

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