Rattlegram vs Flaresat
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Rattlegram
This app utilizes advanced COFDM technology for audio-based SMS transmission. It supports various modes with specific encoding and modulation techniques, requiring minimal bandwidth for efficient data transfer.
- COFDM technology
- Audio-based SMS
- 160 ms OFDM symbols
- Differential PSK modulation
- Forward error correction
- Low bandwidth requirement
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COFDMTV is based on COFDM (coded orthogonal frequency-division multiplexing) technology: - 160 ms long OFDM symbols - 6.25 Hz per sub-carrier - 1/8 guard interval - differentially encoded PSK (phase-shift keying) modulation - systematic polar codes for forward error correction Currently Modes 14, 15 and 16 are supported: Using either SPC(2048, 1392), SPC(2048, 1056) or SPC(2048, 712) with CRC32C aided SCL decoding and differential QPSK modulation for the payload. Only a bandwidth of 1600 Hz is needed and the transmission of either 85, 128 or 170 bytes take about one second with the leading noise and fancy header disabled.
Flaresat
This app provides a shared live map for groups to coordinate activities. It allows real-time location tracking, map-based chat, and the ability to drop pins and trace routes, with both online and off-grid functionality.
- Shared live map
- Real-time location tracking
- Map-based chat
- Smart pins with notes
- Draw on map
- Breadcrumb recording
- Off-grid communication (with hardware)
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Coordinate the Chaos. Flaresat is the shared live map for your group, online over cellular/WiFi, or completely off-grid with a Meshtastic or MeshCore LoRa radio. Drop pins, trace routes, track locations, and chat in real-time, with or without a signal. It works everywhere: Online: Cloud-synced instantly over 4G/5G/WiFi. Off-Grid: Pair with a Meshtastic or MeshCore radio to chat and track users over LoRa mesh without cell service or internet. STOP ASKING "WHERE ARE YOU?" Live Presence: See everyone's location moving in real-time. Map-Based Chat: Talk while you navigate. Your messages overlay the map so you never lose context. Smart Pins: Mark the meetup spot, the tent, or the hidden trail. Every pin includes notes and navigation. POWERFUL PLANNING TOOLS Draw on the Map: Circle danger zones or draw the path for the group to follow. Breadcrumbs: Record your path so others can retrace your steps. Quick Navigation: One tap on any friend or pin to get walking directions. BUILT FOR REAL LIFE Festivals: Find your friends in the crowd. Off-Roading & Hiking: Stay connected in the backcountry (requires Meshtastic or MeshCore hardware). Family Trips: Keep the convoy together on the highway. Search & Rescue: Coordinate grids and track team coverage. Trusted by hikers, hunters, search and rescue teams, and festival crews who need a shared map that works anywhere, signal or no signal. PRIVACY FIRST Your location is only shared with the groups you create. You are in control. Download Flaresat and start mapping together.
Screenshots
Verdict
The clearest difference is rating: Rattlegram at 4.5 against Flaresat's 3.5. Rattlegram also leads on ratings volume (23 vs 4). Flaresat's advantage is update cadence (every 6 days vs every 9 months) and review sentiment (100% vs 90%). On price, ads, in-app purchases and monetization model 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.
Rattlegram holds the better App Store score, 4.5 against 3.5. That said, the two scores are not equally well evidenced: Rattlegram has 23 ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 90% of Rattlegram's written reviews are positive against 100% of Flaresat's, so the app with the better star average is not the one people write more warmly about.
Rattlegram ships an update every 9 months, Flaresat every 6 days. The most recent releases landed on October 11, 2026 and October 12, 2026 respectively.
| Parameter | Rattlegram | Flaresat |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (23 ratings) — better | 3.5 (4 ratings) |
| Positive reviews | 90.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 23 — better | 4 |
| Update frequency | Every 9 months | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 1 MB | 89 MB |
| Age rating | 4+ | 4+ |
| Developer | aicodix GmbH | Fares Saleh |
Customer experience
Rattlegram
Flaresat
In-app purchases
Rattlegram
No in-app purchases
Flaresat
No in-app purchases
