SleepWalking Shield vs RackMath
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SleepWalking Shield
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SleepWalking Shield is a dedicated watch app designed to support people who struggle with sleepwalking. Start a session on your watch before you fall asleep and let it quietly monitor for walking movements during the night. If SleepWalking Shield detects that you may be walking in your sleep, it gently wakes you with haptic vibration and sound that increase in intensity if you keep moving. With the companion iPhone app, you can review when potential sleepwalking episodes occurred, including the time and your heart rate at that moment. Over time, you can build a clearer picture of how often you may be sleepwalking and when it tends to happen. SleepWalking Shield is built for people and families affected by sleepwalking who want extra peace of mind at night. The app is completely free to use. Key features: Watch sleepwalking sessions: Start monitoring directly from your wrist before bed and let your watch do the work while you sleep. Gentle wake-up alerts: Receive subtle vibrations and sounds that gradually intensify if you continue walking, helping you wake up more calmly than a sudden loud alarm. Episode timeline on iPhone: See when potential sleepwalking episodes occurred and view your heart rate at those times in the companion iPhone app. Designed for sleepwalking: Focused specifically on walking during sleep, not just general sleep tracking or snoring. Privacy by design: SleepWalking Shield does not collect or share any personal data. There are no user accounts and no third‑party analytics. Your information stays on your devices. Completely free: No in‑app purchases, subscriptions or paywalls. Requirements: A watch is required to use SleepWalking Shield. The app relies on your watch to detect walking movements and deliver gentle alerts. The iPhone app is used to view your sleepwalking timeline and related heart rate data recorded by the watch. Important: SleepWalking Shield is a supportive tool and is not a medical device. It does not diagnose, treat, cure or prevent any sleep disorder or health condition. Always speak to a healthcare professional for advice about sleepwalking or other sleep issues.
RackMath
This app removes the guesswork from loading a barbell, providing color-coded diagrams for precise plate loading. It offers alternative weight options when exact matches aren't possible and allows for real-time bar monitoring as plates are added or removed.
- Color-coded plate diagrams
- Nearest weight alternatives
- Customizable plate inventory
- Real-time bar weight monitoring
- Multiple barbell setup organization
- Efficient weight transitions
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Stop doing plate math between sets. Type the weight you want on the bar and Rack Math shows exactly which plates to load per side, based on your plates, your bar, and your gym. Build a list of weights, and it tells you precisely what to ADD and REMOVE to get from each set to the next, so you spend your rest resting. FREE, FOREVER • Instant plate math for any weight, in lb or kg • Your plate inventory: only weights you can actually make • Bar diagrams that match what’s on the bar • Build-on-bar: enter what’s loaded right now and work from there RACK MATH COACH Turn the calculator into a training partner. Try the Coach free for your first 10 workouts. No account. Nothing to cancel. Keep it with a subscription or a one-time Lifetime purchase. • A daily plan built around your lifts: Rack Math schedules what to train next and adapts as you recover • Freshest: an extra generated session for off days. Lifts picked from whatever your recovery says is most rested, with the day’s plan built around them • Cardio-aware recovery: with Apple Health, your runs, rides, and swims count toward what’s fresh, tracked as one total across activities, so swapping a walk for a run never reads as slacking • Unlimited weights in your stack • Warmup ramps in one tap: straight sets, top set + backoff, or 5/3/1 • Follow mode: the current set lights up, DONE advances, the next plate change is always right in front of you • Lock Screen Live Activity: your rest countdown, next set, and exact plate change. Log your set, skip rest, or load the next exercise without unlocking your phone • Apple Watch: follow along from your wrist with displays for weight, per-side plates, a rest timer that taps you when it’s up, and one-tap DONE, synced from your iPhone • Automatic progression: Rack Math suggests your next weights and reps • Strength tracking: your estimated 1-rep max over time, and personal records • Gyms: save plate setups for home, work, or travel and switch in two taps • Workout timer with per-exercise split times • Apple Health: finished workouts logged as strength training (optional) • Workout history: what you lifted, how long it took, your top weight, and the ability to reload any past stack onto the bar • Fewer-swaps optimizer: re-arranges the whole workout’s plate layouts to minimize how many plates you touch • Save and reload your stacks Choose your plan: Monthly, Annual (best value), or pay once for Lifetime. The plate calculator stays free either way. No ads. PRIVATE BY DESIGN Rack Math has no accounts and no ads. Your training lives on your device and, if you use iCloud, syncs privately through your own iCloud account; we never see it. We use one privacy-first analytics tool that collects no personal data and can’t identify you. Writing to Apple Health is entirely opt-in. See our privacy policy: https://keithjeffery.org/rack-math-privacy
Screenshots
Verdict
The clearest difference is device support: RackMath at 3 against SleepWalking Shield's —. On price, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | SleepWalking Shield | RackMath |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.0 (4 ratings) — better |
| Positive reviews | — | 33.3% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | — | Weekly |
| Ads | — | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | — | iPhone, iPad, Apple Watch — better |
| Requires iOS | 17.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 15 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Pulse Digital Health Ltd. | Keith Jeffery |
In-app purchases
SleepWalking Shield
No in-app purchases
RackMath
No in-app purchases









