Heat 1 vs Duo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Heat 1
Engage in functional fitness competitions by predicting athlete performance. Participate in leagues and thrilling game types like Top 10 and Shot Caller to earn points and test your sports strategy.
- Follow functional fitness competitions
- Participate in leagues
- Top 10 athlete prediction game
- Shot Caller pick-per-event game
- Earn points based on predictions
- Real-time engagement
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Immerse yourself in functional fitness competitions with Heat 1! Our app lets you not only follow the action but actively participate in the excitement. Join leagues in Heat 1 and engage in thrilling game types: Top 10: Select the top 10 male and female athletes you believe will dominate the competition. Earn points based on the accuracy of your predictions and see how your choices stack up against the actual results. Shot Caller: Step into the shoes of a strategist with this pick-per-event game. For each event, choose 5 athletes and accumulate points based on their performance in the event. Don't just spectate, be a part of the action! Download our app now with interactive gameplay and real-time engagement.
Duo
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Duo turns your iPhone or iPad into the clock beside the board — a real chess clock. The whole side is the button: tap it, slap it, palm it. A deep click, a proper clack, and a flag that falls. White plays on paper, Black plays on ink, so there is never a question of whose side is whose. Timing is timestamp-based and never drifts. Download and you are playing in seconds — no account, no onboarding, no ads. EVERY TIME CONTROL • Sudden death, Fischer increment, Bronstein and simple delay • Multi-stage FIDE controls (90 min / 40 moves + 30 min, with increment) • Per-player handicap and hourglass • Byo-yomi for Go and shogi, and overtime penalty scoring for Scrabble (Pro) • Built-in presets from bullet to classical, plus your own custom controls NEVER LOSE ON TIME IN SILENCE • Red low-time glow with tenths of a second under twenty seconds • Chimes at 60 and 30 seconds, a per-second tick under ten • Haptics you can feel through the table MADE FOR THE TABLE • Table Mode: lay the device flat and each half rotates to face its player, like a tournament clock beside the board • Works beautifully on iPhone and iPad, portrait or landscape • Pause for arbiter corrections: adjust either clock mid-game • The board decides: record wins, losses and draws that end over the board A CARD FOR EVERY GAME Every game ends with a designed, shareable game card — winner, moves, think times and the clock race in one image. Post it or save it to Photos. DUO PRO — ONE PURCHASE, NO SUBSCRIPTION • Full game history, with a card for every past game • Statistics, playing habits and head-to-head rivalry records • Midnight and Walnut themes • Byo-yomi, penalty overtime, voice announcements, unlimited saved controls • One-time purchase, shareable with your family through Family Sharing Duo records your games from day one, so if you unlock Pro later, your earlier games appear in history retroactively. PRIVATE BY DESIGN No account. No ads. Player names and game history stay on your device. Only anonymous, aggregate usage counts are ever collected. Requires iOS 17 or later. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Heat 1 at none against Duo's 1. On price, ads, device support 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. Duo sells 1 one-off in-app purchase. Heat 1 asks for nothing beyond the download.
| Parameter | Heat 1 | Duo |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (48 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 48 — better | — |
| Update frequency | Every 5 days | — |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 30 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Adam Ambrosius | - ASADUZZAMAN |
In-app purchases
Heat 1
No in-app purchases
Duo
- Duo Pro$6.99









