Comparison

Liftosaur vs RPE 8 (slowdown tracker)

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

RPE 8 (slowdown tracker)

Features
Read full description

Slowdowns in free tier. Works best in 4-20 repetition range and under a minute of time under tension. Limitations: Does not track well true grinder reps. Slower than 20 mm/s. Reps with a pause mid rep are not tracked. Free tier displays slowdowns. The number turns red when the slowdown is likely above RPE 8 for that repetition range. Paid tier displays average repetition velocity. Does not collect or send any of your data, all local processing.

Screenshots

Liftosaur4 screens

Verdict

The call

The clearest difference is in-app purchases: RPE 8 (slowdown tracker) at none against Liftosaur's 3. RPE 8 (slowdown tracker) also leads on iOS requirement (15.6 vs 17.0). Liftosaur's advantage is update cadence (every 6 days vs fortnightly). On price, 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. Liftosaur sells 3 in-app purchases, starting at $4.99 per month. RPE 8 (slowdown tracker) asks for nothing beyond the download.

UpkeepUpdate frequency

Liftosaur ships an update every 6 days, RPE 8 (slowdown tracker) fortnightly. The most recent releases landed on September 25, 2026 and September 13, 2026 respectively.

Scorecard3 real differences · 7 level
Liftosaur versus RPE 8 (slowdown tracker): the parameters behind the verdict, then further details
ParameterLiftosaurRPE 8 (slowdown tracker)
PriceFreeFree
Rating4.9 (394 ratings) — better—
Positive reviews89.6% of reviews—
Number of ratings394 — better—
Update frequencyEvery 6 days — betterFortnightly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple WatchiPhone, iPod, Apple Watch
Requires iOS17.015.6 — better
Further details — not scored
Size66 MB1 MB
Age rating17+4+
DeveloperLiftosaur, LLC德凯 郝

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

RPE 8 (slowdown tracker)

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
None

RPE 8 (slowdown tracker)

No in-app purchases

Questions

Is Liftosaur free?
Liftosaur is free to download, with in-app purchases available.
Is RPE 8 (slowdown tracker) free?
RPE 8 (slowdown tracker) is free to download, with no in-app purchases.
Do Liftosaur or RPE 8 (slowdown tracker) have ads?
Neither Liftosaur nor RPE 8 (slowdown tracker) shows ads.
Which is updated more often, Liftosaur or RPE 8 (slowdown tracker)?
Liftosaur ships an update every 6 days, and RPE 8 (slowdown tracker) fortnightly. Most recently, Liftosaur was updated on September 25, 2026 and RPE 8 (slowdown tracker) on September 13, 2026.

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