Comparison

Calmset vs Parallel Rest Timer

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

Head to head
About

Calmset

Features
Read full description

Calmset gives you one thing and does it well: precise rest timing between sets, based on exercise science. Rest periods matter. Too short and you leave strength on the table. Too long and you lose the metabolic stimulus. Calmset takes the guesswork out with evidence-based presets tuned to your training goal. EVIDENCE-BASED PRESETS • Strength: 3–5 minutes — full phosphocreatine recovery • Hypertrophy: 60–90 seconds — optimal metabolic stress • Endurance: 30–45 seconds — sustained cardiovascular demand • Set your own duration with Pro GUIDED BREATHING BETWEEN SETS • 8 structured breathing patterns during rest intervals • From quick activation to deep recovery • Each pattern grounded in peer-reviewed sports science • Visual breathing guide synced to your rest timer WORKS WHERE YOU NEED IT • Background and lock screen — no need to keep the app open • Apple Watch companion with guided breathing • Live Activity and Dynamic Island support • Haptic and sound alerts when rest ends MULTI-SET TRAINING • Queue sets and let the timer count them down • Auto-advance moves you through sets hands-free • Weekly Pulse — training summary with week-over-week trends • Session history to track rest patterns over time DESIGNED FOR THE GYM FLOOR • Dark, minimal interface — reads clean between sets • No account required. No data collection. • No ads. No subscriptions. • 14 languages supported CALMSET PRO — $4.99 LIFETIME One purchase. Yours forever. • Unlimited sets per session • Custom rest durations • Auto-advance between sets • Live Activity and Dynamic Island • Apple Watch companion • Full session history Built by a sports physiotherapist with over a decade of clinical experience. Proper rest between sets is one of the simplest ways to improve your training — and most people get it wrong.

About

Parallel Rest Timer

Features
Read full description

I built this app because I was tired of overly complicated workout trackers. I didn't want to click through menus logging my reps, sets, and weight records just to finally start a simple rest timer. If you just want to start your workout and time your breaks, this is the app for you. It does exactly what it says: lets you start a workout session and run multiple rest timers at the same time, right from your wrist. What it does: - Closes your rings: It starts a real watchOS workout session, so your heart rate is tracked and your active calories count toward your Apple Health rings. - Phone-free: Works entirely on your Apple Watch so you can leave your phone in your locker or at home. - Concurrent timers: Run multiple break timers in parallel. - Not just for lifting: You can select different activity types, making it just as useful for running, HIIT, yoga, or any other workout outside the weight room. - 100% Private: This app maximizes your privacy. It doesn't even ask for internet access, requires no accounts, and does zero tracking. Your data never leaves your device. No fluff, no mandatory data entry, and no tracking. Just start your activity, and time your rests.

Screenshots

Calmset4 screens

Verdict

The call

The clearest difference is in-app purchases: Parallel Rest Timer at none against Calmset's 1. Calmset's advantage is iOS requirement (16.2 vs 18.0). 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. Calmset sells 1 one-off in-app purchase. Parallel Rest Timer asks for nothing beyond the download.

UpkeepUpdate frequency

Calmset ships an update every 5 days, Parallel Rest Timer weekly. The most recent releases landed on September 13, 2026 and September 18, 2026 respectively.

Scorecard2 real differences · 4 level
Calmset versus Parallel Rest Timer: the parameters behind the verdict, then further details
ParameterCalmsetParallel Rest Timer
PriceFreeFree
Update frequencyEvery 5 days — betterWeekly
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhone, Apple WatchiPhone, Apple Watch
Requires iOS16.2 — better18.0
Further details — not scored
Size31 MB7 MB
Age rating4+4+
DeveloperCANER OZBEKRemigiusz Herba

In-app purchases

1 purchases

Calmset

One-time1
  • Calmset Pro$4.99
None

Parallel Rest Timer

No in-app purchases

Questions

Is Calmset free?
Calmset is free to download, with in-app purchases available.
Is Parallel Rest Timer free?
Parallel Rest Timer is free to download, with no in-app purchases.
Do Calmset or Parallel Rest Timer have ads?
Neither Calmset nor Parallel Rest Timer shows ads.
Which is updated more often, Calmset or Parallel Rest Timer?
Calmset ships an update every 5 days, and Parallel Rest Timer weekly. Most recently, Calmset was updated on September 13, 2026 and Parallel Rest Timer on September 18, 2026.

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