Comparison

Liftosaur vs LightKing

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

Head to head
About

Liftosaur

This app automates strength training by allowing users to build custom progressive overload programs or use pre-built routines. It tracks workouts, visualizes progress, and automatically adjusts weights and reps based on user-defined logic, making it a smart fitness companion.

Highlights
  • Automated progressive overload
  • Scriptable workout builder (Liftoscript)
  • Pre-built popular lifting programs
  • Workout tracking and progress visualization
  • Rest timers and plate calculator
  • Body weight and measurement tracking
  • Cloud backup and cross-device sync
Features
Read full description

Liftosaur is the most customizable weightlifting app and strength training tracker and planner. # Automate Your Strength Training Build your own progressive overload programs or start with proven routines like GZCLP, 5/3/1, or Basic Beginner Routine. Track every workout, visualize your progress, and fully automate your training — all in one smart fitness app. Stop guessing your next weight. Liftosaur automatically increases or decreases your weights and reps based on the logic you define. It allows to implement any possible progressive overload logic, so you can focus on lifting while the app handles the math. Liftosaur introduces Liftoscript — a simple text language for building workouts like code. Define exercises, sets, and logic once right in text, and the app updates it automatically after each session. Example: ``` # Week 1 ## Day 1 Bent Over Row / 2x5, 1x5+ / 95lb / progress: lp(2.5lb) Bench Press / 2x5, 1x5+ / 45lb / progress: lp(2.5lb) Squat / 2x5, 1x5+ / 45lb / progress: lp(5lb) ## Day 2 Chin Up / 2x5, 1x5+ / 0lb / progress: lp(2.5lb) Overhead Press / 2x5, 1x5+ / 45lb / progress: lp(2.5lb) Deadlift / 2x5, 1x5+ / 95lb / progress: lp(5lb) ``` This makes Liftosaur the only scriptable workout app — perfect for lifters who love structure, logic, and data. # Popular Programs Included Liftosaur comes with pre-built lifting programs and templates from the strength community: • All GZCL programs: GZCLP, P-Zero, The Rippler, VHF, VDIP, General Gainz, etc • 5/3/1 and its variations • Basic Beginner Routine from r/Fitness • Strong Curves • And many more! Every program is written in Liftoscript, so you can customize every detail — sets, reps, progression rules, and deloads. # Track Everything Liftosaur isn’t just a gym tracker — it’s your complete workout planner and data companion. • Rest timers & plate calculator • Body weight and measurement tracking • Graphs for exercises and progress over time • Equipment rounding & exercise substitutions • Cloud backup and cross-device sync • Web Editor for faster program creation on desktop # Made for Powerlifters and Beginners Alike Whether you’re starting your first strength program or fine-tuning an advanced powerlifting routine, Liftosaur adapts to your style. It’s a lifting program builder, progress tracker, and gym log app — all working together to make you stronger. Weightlifting is a long game, and if you're serious about lifting, building strength and sculpting your body, Liftosaur would be a great partner in your journey. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

LightKing

Features
Read full description

LightKing is a daylight closer. Your Apple Watch already measures Time in Daylight. We ping you when today's pace is slipping, while you still have time to get outside. HOW IT WORKS Set a daily daylight goal, reminder fequency, and a light window (default 30 minutes, 8:00 to 18:00). LightKing monitors Time in Daylight from Apple Health. We never write samples and we never upload your minutes. If you fall behind, you get a ping with enough time to get outside. *RECENT APPLE WATCH REQUIRED Time in Daylight comes from Apple Watch (SE 2, Series 6, or Ultra). iPhone cannot measure this. No Watch means an empty day. Allow Health, Notifications, and Background App Refresh. FREE AND PRO Free: Progress, morning motivation, celebrations, and 3 Rescue Ping days that count only when they work. Pro: Unlimited behind-pace pings. Try it free for 7 days. Cancel anytime in App Store subscriptions. Your daylight time stays on your device. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Liftosaur4 screens
LightKing4 screens

Verdict

The call

Liftosaur and LightKing are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. Liftosaur sells 3 in-app purchases, starting at $4.99 per month and LightKing sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
Liftosaur versus LightKing: the parameters behind the verdict, then further details
ParameterLiftosaurLightKing
PriceFreeFree
Rating4.8 (426 ratings) — better—
Positive reviews89.9% of reviews—
Number of ratings426 — better—
Update frequencyEvery 6 days—
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, Apple Watch
Requires iOS17.0 — better17.6
Further details — not scored
Size64 MB17 MB
Age rating17+4+
DeveloperLiftosaur, LLCFrank Sloan

Bugs and requests

Liftosaur

Reported bugs

8 issues
  • App crashes frequently after updates
  • Syncing issues with iPhone Health app
  • App freezes on startup screen, requires reinstallation
  • Changes to program not saving correctly
  • Error when trying to set different warm-ups for different weeks
Show 3 more
  • Cannot change equipment type from cable to barbell
  • Pulls reps and weight from wrong days
  • Newest update crashes the app, prevents program selection/editing

Requested features

4 requests
  • Dark mode option
  • Ability to use kgs for barbell and lbs for dumbbells
  • More intuitive UI for beginners
  • Improved documentation/organization of ideas

LightKing

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Liftosaur

Subscriptions2
  • Monthly Subscription14 Days trial$4.991 Month
  • Yearly Subscription14 Days trial$39.991 Year
One-time1
  • Lifetime Subscription$99.99
2 purchases

LightKing

Subscriptions2
  • LightKing Pro: Monthly7 Days trial$0.991 Month
  • LightKing Pro: Founder Annual7 Days trial$9.991 Year

Questions

Is Liftosaur free?
Liftosaur is free to download, with in-app purchases available.
Is LightKing free?
LightKing is free to download, with in-app purchases available.
Do Liftosaur or LightKing have ads?
Neither Liftosaur nor LightKing shows ads.

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