Comparison

areoHDR vs Vote Defender

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

Head to head
About

areoHDR

Experience real images from the Mars Perseverance Rover in high dynamic range (HDR) and color calibrated for human vision. Navigate through sols and images, zoom in, and access a Mars calendar. The free version offers access to the latest 200 sols.

Highlights
  • High Dynamic Range (HDR) Mars images
  • Color calibrated for human vision
  • Navigate sols and images
  • Zoom and rotate controls
  • Mars calendar feature
  • Access to latest 200 sols (free)
Features
Read full description

With HDR, the images glow brightly in high contrast on the screen, not visible here in the screenshots as it can only be experienced on the device. The areoHDR app shows images taken only a few hours ago on planet Mars by NASA Perseverance Rover, which landed on 18 February 2021 and is currently driving in and around Jezero Crater. Since version 1.5.0 all color images taken by Viking Lander 1 & 2 are also available. Viking Lander 1 touched down on 20 July 1976 as first successful landing on another planet. This is currently the only app showing real Mars images in high dynamic range (HDR) and color calibrated for human vision to bring the experience, human explorers on Mars would have themselves, to iPhone and iPad. To navigate through the sols (days on Mars since landing) and images of each sol, either tap on the two up/down buttons on the right side or swipe horizontally or vertically or rotate the wheel with the sol numbers. Double tap or pinch with two fingers to zoom in and out. The images are taken by the 20 Megapixel Navcam pair inside the rover's "head" 2m above the surface, the two 20MP front and rear Hazcam pairs near the ground, Watson Camera on the robotic arm and Cachecam in the underside sample storage bay. A Mars calendar ist now available by long press on the arrow-down button where the day on Mars (sol) can be selected via the position in the astronomical solar year or the date on Earth. HDR works on all iPhone & iPad Pro models released since late 2018 and all Macbook Pro since M1. Other devices will also show the images, but not in full HDR. No AI processing is applied to the images and no artificial color adjustment. This is the real view on Mars! The color processing uses a preset white-balance set to sunny daylight on Earth, to visualize the experience a human explorer would have on the Mars surface. That is the same configuration available on any commercial digitial camera when setting it to manual daylight white-balance. The raw image data used to produce the color processed images is publicly provided by NASA / JPL-Caltech. The color processed images shown by the App are separate derived data products and created by the app author's backend system. The free version allows access to the latest 200 sols (days on Mars since landing). By subscribing within the app, you can access all more than 1500 Mars-days since landing sol 0. The standard Apple Terms of Use apply for this app: https://apple.com/legal/internet-services/itunes/dev/stdeula

About

Vote Defender

Features
Read full description

Vote Defender is a community-powered civic advocacy platform built to protect your constitutional right to vote. WHETHER YOU'RE AT THE POLLS OR IN YOUR COMMUNITY • Live community map — see real-time reports of voting conditions, poll wait times, ride requests, and incidents near you • Drop a pin to report what you see — long lines, intimidation, accessibility issues, or anything your neighbors should know • Safe Zones & Safe Corridors — community-verified safe routes and locations mapped for Election Day KNOW YOUR RIGHTS BEFORE YOU VOTE • Plain-language breakdowns of your voting rights under the Constitution and federal law • Know Your Voting Rights guide — what's protected, what to do if your rights are challenged, and who to call • AI-powered civic assistant to answer your questions in real time YOUR BALLOT, YOUR VOICE • Look up your personalized ballot before Election Day — candidates, measures, and races specific to your address • Browse candidate profiles and policy positions with AI-assisted research • Track your congressional and senate representatives and how they vote on issues that matter to you COMMUNITY ASSISTANCE PLATFORM • Need a ride to the polls? Request help directly from the map • Scouts — trained community advocates — can respond to requests and provide on-the-ground updates • Secure, role-based messaging so requests stay private and responses stay coordinated BUILT FOR CIVIC ADVOCATES • Partner organizations can onboard scouts and community members through a secure invite system • Admin tools for managing safe zones, service requests, and community reports • Broadcast alerts and hotspot resources — legal aid, food banks, healthcare, shelters, and more Vote Defender is built on the belief that access to the ballot is a constitutional right — not a privilege. Every feature is designed to support voters, protect civil liberties, and strengthen the civic fabric of our communities. Your data stays yours. No ads. No tracking. Built for the people.

Screenshots

areoHDR4 screens
Vote Defender4 screens

Verdict

The call

The clearest difference is in-app purchases: Vote Defender at none against areoHDR's 2. Vote Defender also leads on update cadence (every 2 days vs every 2 months) and iOS requirement (15.1 vs 17.0). On price, 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. areoHDR sells 2 in-app purchases, starting at $1.99 per month. Vote Defender asks for nothing beyond the download.

UpkeepUpdate frequency

areoHDR ships an update every 2 months, Vote Defender every 2 days. The most recent releases landed on October 7, 2026 and October 19, 2026 respectively.

Scorecard3 real differences · 7 level
areoHDR versus Vote Defender: the parameters behind the verdict, then further details
ParameterareoHDRVote Defender
PriceFreeFree
Rating5.0 (4 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 2 monthsEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Vision ProiPhone, iPad, iPod
Requires iOS17.015.1 — better
Further details — not scored
Size2 MB48 MB
Age rating4+17+
DeveloperHolger IsenbergRafael CONCEPCION

In-app purchases

2 purchases

areoHDR

Subscriptions1
  • Mars 2020 monthly renewing$1.991 Month
One-time1
  • Mars 2020 1 week non-renewing$0.99
None

Vote Defender

No in-app purchases

Questions

Is areoHDR free?
areoHDR is free to download, with in-app purchases available.
Is Vote Defender free?
Vote Defender is free to download, with no in-app purchases.
Do areoHDR or Vote Defender have ads?
Neither areoHDR nor Vote Defender shows ads.
Which is updated more often, areoHDR or Vote Defender?
areoHDR ships an update every 2 months, and Vote Defender every 2 days. Most recently, areoHDR was updated on October 7, 2026 and Vote Defender on October 19, 2026.

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