Comparison

FastFox vs TriSync

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

FastFox

Features
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FastFox makes intermittent fasting simple with real-time phase tracking, body metrics, and personalized insights. No subscriptions β€” just a one-time Pro upgrade. FASTING TIMER & PHASES: - Beautiful countdown ring with real-time progress - See your current fasting phase β€” from fat burning to ketosis and autophagy - Supports 16:8, 18:6, 20:4, OMAD, and custom schedules - Smart timer saves progress in background and auto-completes fasts FASTING GUIDE LIBRARY: - 10 expert articles on coffee, exercise, sleep, electrolytes, and more - Science-backed answers to common fasting questions HISTORY & TRACKING: - Calendar view with complete log of all past fasts - Weekly summary with streak counter - Water intake and energy level tracking per fast - Fast summary review after every session HOME SCREEN WIDGET: - Track your fasting timer and phase right from your home screen - Small and medium widget sizes with real-time countdown - Auto-updates with phase transitions β€” no need to open the app PRO (one-time $14.99): - Personalized Insights β€” Smart coaching based on your fasting patterns, best schedule, weak days, and optimal start times - Body Metrics Dashboard β€” Track weight, BMI, waist, and body fat trends with visual charts - Phase Deep Dive β€” Detailed science behind each fasting stage - Fasting Guide Library β€” Full access to all 10 expert guides - Custom Schedule β€” Set your own fasting hours beyond standard presets - CSV & PDF Export β€” Export your data and reports anytime - Ad-Free Experience β€” Clean, distraction-free interface PRIVACY FIRST: All data stays on your device. No accounts, no cloud uploads. Your health data belongs to you. WHY FASTFOX? Most fasting apps lock basic features behind $40–80/year subscriptions. FastFox gives you a complete fasting tracker β€” phases, insights, body metrics, and guides β€” for a single one-time purchase. No recurring charges, ever. Made by MyQuietSpot Inc.

About

TriSync

Features
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TriSync is triathlon training for age-group athletes who want structure without a coach price tag. Triathlon isn’t three separate sports. Brick fatigue, cross-discipline load, and race-distance periodization matter β€” and generic fitness apps ignore them. TriSync doesn’t. WHAT YOU GET β€’ AI-built plans for Sprint, Olympic, 70.3, and Ironman β€’ Plans shaped by your race date, experience, weekly hours, and gear β€’ Today: exactly what to do, and why it matters β€’ Plan: month calendar + week load view to own your schedule β€’ Honest logging with RPE (1–10) and optional notes β€’ Pro coach tools: auto-adapt after missed weeks, check-ins, time away, and injury pause β€’ Apple Watch workout templates and Strava import (Pro) FREE Log sessions and explore week one of your plan. PRO Unlock the full multi-week plan, AI rebuilds, adaptations, and device sync. Try weekly with a 7-day free trial, or go yearly for a full training cycle. Calm coaching energy. No hype. No fake urgency β€” just a plan that respects how triathlon actually works. Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://guan-eric.github.io/trisync-legal/privacy/

Screenshots

FastFox4 screens
TriSync4 screens

Verdict

The call

The clearest difference is ads: TriSync at none against FastFox's shown. TriSync also leads on update cadence (every 3 weeks vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. FastFox sells 1 one-off in-app purchase and TriSync sells 2 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

FastFox ships an update every 2 months, TriSync every 3 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard2 real differences Β· 4 level
FastFox versus TriSync: the parameters behind the verdict, then further details
ParameterFastFoxTriSync
PriceFreeFree
Update frequencyEvery 2 monthsEvery 3 weeks β€” better
AdsYesNo β€” better
In-app purchasesYesYes
DevicesiPhone, iPad, iPod β€” betteriPhone, iPad
Requires iOS15.0 β€” better16.4
Further details β€” not scored
Size51 MB63 MB
Age rating12+4+
DeveloperMyQuietSpot Inc.Eric Guan

In-app purchases

1 purchases

FastFox

One-time1
  • FastFox Pro$14.99
2 purchases

TriSync

Subscriptions2
  • TriSync Weekly 27 Days trial$9.997 Days
  • TriSync Yearly 2$79.991 Year

Questions

Is FastFox free?
FastFox is free to download, with in-app purchases available.
Is TriSync free?
TriSync is free to download, with in-app purchases available.
Do FastFox or TriSync have ads?
FastFox shows ads; TriSync does not.
Which is updated more often, FastFox or TriSync?
FastFox ships an update every 2 months, and TriSync every 3 weeks. Most recently, FastFox was updated on October 25, 2026 and TriSync on October 24, 2026.

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