MapSwipe vs Check US Visa Slots
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MapSwipe
Contribute to humanitarian efforts by analyzing satellite imagery. Identify settlements, roads, and rivers in crisis-prone areas to help aid organizations locate vulnerable populations. Your contributions enable faster and more effective delivery of life-saving assistance.
- Analyze satellite imagery
- Identify settlements and infrastructure
- Support humanitarian missions
- Contribute to mapping projects
- Crowdsource data for aid organizations
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Make a meaningful impact from your phone, one swipe at a time. MapSwipe is part of the Missing Maps project. It is a free, open-source app that lets anyone contribute to humanitarian and development projects in just minutes a day. No mapping experience needed: review satellite imagery, identify features like buildings, roads, and waterways, and help validate map data used by organizations around the world. The data you generate supports humanitarian organizations, researchers, and local communities, making OpenStreetMap data more accessible for disaster response, public health, climate resilience, and sustainable development. How you can contribute: * Find Features: Swipe through satellite imagery to spot buildings, roadways, waterways, and more * Compare Dates: Review before-and-after imagery to detect environmental changes and assess damage * Validate Footprints: Check building footprints and flag areas that need remapping * Check Completeness: Compare mapped data against aerial imagery to find gaps * Assess Images: Review photographs to confirm features and improve machine learning tools * Locate Objects: Mark rooftops, solar panels, trees, and other features to help train machine learning models Your swipes have real impact. MapSwipe is managed by a volunteer-led team with support from the American Red Cross, British Red Cross, Canadian Red Cross, HeiGIT, Humanitarian OpenStreetMap Team, Médecins Sans Frontières, and Togglecorp. Download MapSwipe and join a global community putting the world's most vulnerable places on the map.
Check US Visa Slots
This app helps US visa applicants find appointment openings at consulates worldwide. It uses crowdsourced data and real-time updates from other users to show availability for various visa types. Users can also set up alerts for when appointments become available.
- Crowdsourced slot availability data
- Real-time updates from users
- Visibility into F-1, H-1B, B1/B2 visa slots
- Time-saving trend analysis
- Customizable appointment opening alerts
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See recently reported US visa appointment availability by location. Choose your preferred dates and locations to personalize alerts. Community reports can change before you book. CHECK AVAILABILITY WITH CONTEXT • View reported appointment dates and last-checked times. • See when slots last appeared at a location. • Set preferred dates and biometric or consular locations for eligible alerts. • Review alert history, including whether an alert was sent to you and the recorded reason. COVERAGE AND FRESHNESS Supported locations include Chennai, Hyderabad, Kolkata, Mumbai, and New Delhi in India. Available locations and alert options vary by country, visa category, and appointment type. Use the options available for your registration. Updates come from community reports. Check the displayed timestamps: this is not a continuous feed from the official booking system. Reports can become outdated before you sign in to book. ACCESS AND ALERT ELIGIBILITY Sign in with the access code from your CheckVisaSlots registration. Availability access is subject to usage limits. Personalized alerts require an active alert plan; paid plans and eligible trials have their own access conditions. Alerts depend on matching preferences, reported availability, and account eligibility. Limited-slot alerts can depend on recent contributions and contributor rank. Qualifying bulk alerts may be sent without recent contributions. Eligible trials may have limited alert coverage. Contribute availability reports through a supported CheckVisaSlots browser extension while checking the official visa portal. Use the same registered account. The app's Alerts section shows your preferences, history, and rank. Enable notifications on your eligible device for mobile alerts. BEFORE YOU BOOK A report or alert does not reserve an appointment or guarantee that a slot remains available. Confirm availability and complete your appointment booking through the official visa scheduling service. CheckVisaSlots.com is not affiliated with the US Government, its agencies, or official visa appointment booking platforms. For official scheduling information, visit https://www.ustraveldocs.com/
Screenshots
Verdict
The clearest difference is ratings volume: Check US Visa Slots at 301 against MapSwipe's 27. Check US Visa Slots also leads on update cadence (every 3 weeks vs every 6 weeks) and device support (4 vs 2). MapSwipe's advantage is review sentiment (76% vs 67%). On price, rating, 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.
Check US Visa Slots holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: Check US Visa Slots has 301 ratings behind it against 27, so its average is the more settled of the two. Written reviews complicate that: 76% of MapSwipe's written reviews are positive against 67% of Check US Visa Slots's, so the app with the better star average is not the one people write more warmly about.
MapSwipe ships an update every 6 weeks, Check US Visa Slots every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | MapSwipe | Check US Visa Slots |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (27 ratings) | 4.7 (301 ratings) — better |
| Positive reviews | 76.2% of reviews — better | 66.7% of reviews |
| Number of ratings | 27 | 301 — better |
| Update frequency | Every 6 weeks | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 16.4 | 15.0 — better |
| Further details — not scored | ||
| Size | 65 MB | 38 MB |
| Age rating | 4+ | 4+ |
| Developer | British Red Cross | TWIPPY TECHNOLOGIES PRIVATE LIMITED |
Customer experience
MapSwipe
Check US Visa Slots
In-app purchases
MapSwipe
No in-app purchases
Check US Visa Slots
No in-app purchases
Questions
Is MapSwipe free?
Is Check US Visa Slots free?
Which has better reviews, MapSwipe or Check US Visa Slots?
Do MapSwipe or Check US Visa Slots have ads?
Which is updated more often, MapSwipe or Check US Visa Slots?
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