Comparison

PeakFlow vs Spar Log

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

Head to head
About

PeakFlow

This app helps you build effective habits by providing personalized, science-backed recommendations based on your lifestyle and goals. It uses data to show you which habits improve your sleep, energy, focus, and performance, offering clarity without hype.

Highlights
  • Personalized habit recommendations
  • Science-backed protocols
  • Daily wellness check-ins
  • Habit impact analytics
  • Streak tracking
  • Community challenges
Features
Read full description

PeakFlow – Build Habits That Actually Stick. Most people don’t fail because they lack discipline. They fail because they follow habits that don’t fit their life. PeakFlow fixes that. Instead of guessing what “should” work, PeakFlow shows you — with data — which habits actually improve your sleep, energy, focus, and performance. No fluff. No motivation hype. Just clarity. WHY PEAKFLOW WORKS Personalized From Day One Answer a few questions and get a routine tailored to your goals, schedule, and lifestyle — not someone else’s morning routine. Science-Backed, Not Trend-Based Every habit and protocol is rooted in peer-reviewed research from neuroscience and behavioral psychology. See What Actually Moves the Needle Daily check-ins and a wellness scoring system, coupled with AI, reveal how each habit impacts your energy, sleep, stress, and focus. Built for Consistency (Not Perfection) Streaks, challenges, and simple routines help you stay consistent — without burning out. Accountability That Actually Helps Compete with friends, join challenges, and stay engaged through shared progress. WHAT YOU CAN IMPROVE • Sleep quality • Daily energy • Mental focus • Stress levels • Physical performance • Long-term health & longevity CORE FEATURES* • Personalized habit recommendations • Morning, afternoon, and evening routines • Daily wellness check-ins with performance scoring • Habit impact analytics & insights • 100+ science-backed protocols • Streak tracking & motivation tools • Community leaderboards & friend challenges WHY USERS STICK WITH PEAKFLOW Because it removes uncertainty. You stop asking: “Is this habit even helping me?” And start seeing real feedback — daily. START TODAY Try PeakFlow and see what actually works for you. 7-day free trial. Cancel anytime. Your future self doesn’t need more motivation. It needs a system that works. ------------------------------------------ *SUBSCRIPTION REQUIRED TO UNLOCK ALL FEATURES. Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Spar Log

Features
Read full description

Spar Log is a simple training tracker built for boxing and fitness athletes. Log your training sessions, track rounds, effort, and mood, and use the built-in round timer to structure your workouts. Designed to be clean, fast, and distraction-free, Spar Log helps you stay consistent and review your progress over time. Features: • Log training sessions in seconds • Track rounds, effort, and mood • Built-in round timer with rest periods • Visual and sound cues during training • Clean, light design • Data stored locally on your device Spar Log is built to help you train smarter — one session at a time.

Screenshots

PeakFlow4 screens
Spar Log4 screens

Verdict

The call

The clearest difference is in-app purchases: Spar Log at none against PeakFlow's 5. Spar Log also leads on device support (3 vs 1). On price, update cadence, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. PeakFlow sells 5 in-app purchases, starting at $9.99 per month. Spar Log asks for nothing beyond the download.

UpkeepUpdate frequency

PeakFlow ships an update every 5 days, Spar Log every 8 days. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
PeakFlow versus Spar Log: the parameters behind the verdict, then further details
ParameterPeakFlowSpar Log
PriceFreeFree
Rating5.0 (14 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings14 — better—
Update frequencyEvery 5 days — betterEvery 8 days
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.615.1 — better
Further details — not scored
Size23 MB68 MB
Age rating17+4+
DeveloperAlfred Caillard--LaniepceLiam Burton

In-app purchases

5 purchases

PeakFlow

Subscriptions5
  • Monthly 9.99$9.991 Month
  • Monthly$12.991 Month
  • Yearly3 Days trial$29.991 Year
Show 2 more
  • Yearly3 Days trial$39.991 Year
  • Yearly 49.993 Days trial$49.991 Year
None

Spar Log

No in-app purchases

Questions

Is PeakFlow free?
PeakFlow is free to download, with in-app purchases available.
Is Spar Log free?
Spar Log is free to download, with no in-app purchases.
Do PeakFlow or Spar Log have ads?
Neither PeakFlow nor Spar Log shows ads.
Which is updated more often, PeakFlow or Spar Log?
PeakFlow ships an update every 5 days, and Spar Log every 8 days. Most recently, PeakFlow was updated on October 24, 2026 and Spar Log on October 31, 2026.

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