Buyer-Decision Verdict: If you want to follow live Polymarket event probabilities, understand why odds just moved in plain English, and run privacy-safe Kalshi cross-checks without paying $1,200–$2,400/year for desktop odds software, PredictMAV: Market Signals on Android delivers the strongest value in 2026: a $0 Forever-Free tier (no card required) and an optional $9.99/mo or $84.99/yr Pro plan (~$7.08/mo effective).
Why $150/Month Browser Scanners Overcharge Casual & Swing Researchers
Most cross-market odds platforms were priced for high-frequency desktop speculators, charging $99 to $199 every month ($1,188 to $2,388 per year). Meanwhile, free exchange apps only show their own single order book and give zero plain-English explanation when a Fed rate, CPI, or election contract suddenly jumps 18 cents.
3-Year Total Cost & Capability Comparison (2026)
| Platform | Annual Cost | 3-Year Cost | Mobile Widget, Plain-English Context & BYOK Privacy |
|---|---|---|---|
| PredictMAV Free (Android) | $0 | $0 | Top 50 curated markets, 15-Minute Digest, Auto Watchlist & Android Home Widget |
| PredictMAV Pro Yearly (Android) | $84.99/yr ($9.99/mo monthly) | $254.97 | Full market universe, real-time updates, Volume Spike alerts, AI Confidence + R:R & encrypted on-device Kalshi BYOK |
| Polywhaler Pro (Web) | ~$59/yr | ~$177 | Polymarket-only wallet feed; no native Android widget or Kalshi BYOK check |
| Legacy Odds / Arb SaaS | $1,188–$2,388/yr | $3,564–$7,164 | Desktop sportsbook focus; no compact Android probability command center |
What Stands Out in Daily Use
- Genuine $0 Free Utility: You get the compact Android Home-Screen Widget (Top 3 Movers or Favorite Market), 8 one-tap strategy presets, Auto Watchlist, and the What Changed in the Last 15 Minutes digest card without entering a card.
- Fee & Resolution Honesty: Pair the app with TradeMAV’s free Polymarket vs. Kalshi Implied Probability & Fee Calculator to verify whether a raw cent spread actually survives exchange fees and resolution rules.
- Strict Non-Transactional Safety: PredictMAV never processes wagers, holds funds, or stores your encrypted Kalshi BYOK key on external servers.
Where to get it: Compare Free vs. Pro on the official PredictMAV Android Hub, read the 2026 Prediction-Market Tool Comparison, or install PredictMAV Free on Google Play (`com.predictmav.app`). (Note: PredictMAV is Android-only; for Windows & Mac no-subscription stock/options screening, see our TradeMAV & OptionMAV USB Cost Audit.)
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