Rattlegram vs OP Owners
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.
OP Owners
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Opus Owners is the community app for people who own OPUS off-road campers. Connect with other owners, share your builds and trips, find camp spots, and keep your rig info in one place — on or off the grid. WHAT YOU CAN DO • Owner feed — trail reports, mod & build threads, questions, and photos • Owner map — drop trip pins and see owners near you (opt-in, privacy-first) • Trading Post — buy, sell, and trade gear with verified owners (no fees) • Think Tank — pitch ideas and back the ones you love • Events — find and RSVP to owner meetups and rallies • Verified Owner badge — add a photo of your camper to get verified Open to everyone; earn the Verified Owner badge to show you're the real deal. DISCLAIMER Opus Owners is an independent, unofficial owner community. It is not affiliated with, endorsed by, sponsored by, or associated with OPUS Campers, OPUS US, or the OPUS Camper brand. All product names and trademarks are the property of their respective owners.
Screenshots
Verdict
The clearest difference is iOS requirement: OP Owners at 15.0 against Rattlegram's 17.6. On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Rattlegram | OP Owners |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (23 ratings) — better | — |
| Positive reviews | 90.0% of reviews | — |
| Number of ratings | 23 — better | — |
| Update frequency | Every 9 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | aicodix GmbH | Stephen Odom |
In-app purchases
Rattlegram
No in-app purchases
OP Owners
No in-app purchases









