RSL Central vs EarnUSD
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RSL Central
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An easy-to-use app to get started with onsemi Bluetooth Low Energy wireless microcontrollers and periphery devices. RSL Central scans for and establishes a Bluetooth Low Energy connection with onsemi Bluetooth Low Energy wireless microcontrollers. The app displays fields such as measured battery level, voltage, current, LED status, push button status, or others depending on the onsemi wireless microcontroller and configuration.
EarnUSD
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EarnUSD is your smart lending rate monitor and yield tracker — built for users who want to stay informed about funding market trends without complexity. SAFE BY DESIGN EarnUSD uses restricted, read-only API access to monitor your portfolio. We never execute trades, transfer funds, or move money. Your assets stay in your own account at all times. We are not a custodian, broker, or money transmitter. KEY FEATURES DAILY YIELD SUMMARY A clean daily push notification at 04:00 UTC shows your lending interest from the previous day across all your supported markets. Wake up informed, no spreadsheet needed. SMART RATE ALERTS Set your own rate thresholds and get pushed the instant market rates exceed your level. Per-market 30-minute cooldown prevents spam. LIVE MARKET CHARTS 24-hour rate timeseries for three supported funding markets. See FRR (Flash Return Rate) trends, identify peak hours, plan your next move. PORTFOLIO DASHBOARD Annualized rate (APR) display. Track principal, interest earned, lending limit usage, and active offers in real time. Multi-currency totals. 7-LANGUAGE SUPPORT English, Traditional Chinese, Simplified Chinese, Vietnamese, Russian, Spanish, and Portuguese (Brazil). Choose at signup or anytime in Settings — a feature most competitors do not offer. NATIVE EXPERIENCE • Light + dark mode auto-follow system • Tap notifications to jump directly to the relevant tab • Per-market notification toggles • Offline state detection with retry SUBSCRIPTION Premium subscribers unlock 24-hour rate charts, alerts across all supported markets, daily yield push, and advanced lending analytics. Manage your subscription at earn-usd.com. DISCLAIMER EarnUSD displays public funding market data via the Bitfinex Funding API. Supported markets are USD, USDT, and BTC funding pools. We are not affiliated with iFinex Inc. Market data is for informational purposes only and does not constitute financial advice. Lending in funding markets carries risks including principal loss, counterparty default, and market volatility. Always do your own research. SUPPORT Email: service@earn-usd.com Web: earn-usd.com FAQ: earn-usd.com/faq Privacy: earn-usd.com/privacy Terms: earn-usd.com/terms
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Verdict
The clearest difference is update cadence: EarnUSD at every 5 days against RSL Central's every 3 months. RSL Central's advantage is device support (3 vs 1). On price, ads, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
RSL Central ships an update every 3 months, EarnUSD every 5 days. The most recent releases landed on September 13, 2026 and September 9, 2026 respectively.
| Parameter | RSL Central | EarnUSD |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 1 MB | 53 MB |
| Age rating | 4+ | 17+ |
| Developer | ON SEMICONDUCTOR CORPORATION | Taiwan1996 |
In-app purchases
RSL Central
No in-app purchases
EarnUSD
No in-app purchases
