Comparison

Spar Log vs IronZenkai

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

Head to head
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.

About

IronZenkai

This app provides personalized strength training programs and macro tracking. It features an AI coach for accountability and progress monitoring, helping users achieve their fitness goals with guided workouts and nutrition planning.

Highlights
  • Personalized periodized training programs
  • Guided workouts with rest timers
  • Macro and calorie target tracking
  • AI accountability coach
  • Progress photo timeline
  • Home Screen widgets
Features
Read full description

Train with real science. Eat for your goals. Track it all in one app. IronZenkai is a workout tracker and gym log built on real training science — not just a set counter — with calorie and macro tracking built in. Plan periodized programs, log every set, snap a photo of your meals, and let your AI coach tie it all together. No second app. No account needed to start. TRAIN SMARTER - Auto-built mesocycle programs (full-body, upper/lower, push-pull-legs and more) matched to your goal, experience, and equipment - Progressive overload that adapts: smart weight, set, and rep suggestions from your last workouts - Fast set logging with RIR, a built-in rest timer, and pre-workout check-ins that tune each session to your energy - Automatic deloads and a guided "plan your next block" flow — never guess what's next - Full exercise library with form guidance and one-tap swaps EAT FOR YOUR GOALS - Photo food logging: snap your plate to get calories and macros, analyzed on-device on supported iPhones - Barcode scanner and a searchable food database - Adaptive TDEE that learns from your weight trend and adjusts your daily targets - Build meals and daily plans that hit your protein, carbs, and fat - Real-time calorie pacing: always know what's left and what to eat MEET ZEN, YOUR COACH - An AI coach that sees your training, nutrition, and weight together - Ask anything: why the scale stalled, what to eat with calories left, how to train around a sore joint - Answers grounded in your real data — not generic advice SEE YOUR PROGRESS - Progress photo timeline with start-to-now comparisons - Weight and strength charts, streaks, and weekly summaries - Milestone share cards and home-screen widgets BUILT RIGHT - Start instantly — no sign-up required - Works offline and syncs when you're back online - Your data stays yours MEMBERSHIP IronZenkai is free to use. An optional membership — a one-time Lifetime purchase or an auto-renewing subscription — unlocks premium coaching and cloud features. Price and length are shown in the app before you buy. Subscriptions auto-renew unless turned off at least 24 hours before the period ends; manage or cancel anytime in your Apple ID settings. Terms of Use: https://ironzenkai.com/terms Privacy Policy: https://ironzenkai.com/privacy Support: support@ironzenkai.com

Screenshots

Spar Log4 screens
IronZenkai4 screens

Verdict

The call

The clearest difference is in-app purchases: Spar Log at none against IronZenkai's 3. IronZenkai's advantage is iOS requirement (13.0 vs 15.1). On price, update cadence, ads and device support 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. IronZenkai sells 3 in-app purchases, starting at $1.99 per month. Spar Log asks for nothing beyond the download.

UpkeepUpdate frequency

Spar Log ships an update every 8 days, IronZenkai every 5 days. The most recent releases landed on October 31, 2026 and October 18, 2026 respectively.

Scorecard2 real differences · 7 level
Spar Log versus IronZenkai: the parameters behind the verdict, then further details
ParameterSpar LogIronZenkai
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 8 daysEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Apple Watch — better
Requires iOS15.113.0 — better
Further details — not scored
Size68 MB163 MB
Age rating4+12+
DeveloperLiam BurtonMelovin Pedida

In-app purchases

None

Spar Log

No in-app purchases

3 purchases

IronZenkai

Subscriptions2
  • IronZenkai Premium$1.991 Month
  • IronZenkai Premium (Yearly)$19.991 Year
One-time1
  • IronZenkai Lifetime$9.99

Questions

Is Spar Log free?
Spar Log is free to download, with no in-app purchases.
Is IronZenkai free?
IronZenkai is free to download, with in-app purchases available.
Do Spar Log or IronZenkai have ads?
Neither Spar Log nor IronZenkai shows ads.
Which is updated more often, Spar Log or IronZenkai?
Spar Log ships an update every 8 days, and IronZenkai every 5 days. Most recently, Spar Log was updated on October 31, 2026 and IronZenkai on October 18, 2026.

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