VOWS Training vs Stackful
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VOWS Training
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VOWS is built for lifting: you log the set on your wrist, the app keeps everything else. LOG SETS FROM YOUR WRIST Your phone can stay in your pocket or bag. Apple Watch shows the next exercise, target reps and weight, and you log the set right there. The rest timer and heart rate are on your wrist. The watch only sends what you did; the phone keeps the record. THE LOAD PROGRESSES ON ITS OWN When every set of an exercise reaches its target, the next session adds weight. Miss even one set and the load holds — it won't push you before you're ready, and it won't knock you back either. Bodyweight moves add reps first, then step up to a harder variation. Change the weight mid-session and the sets you already did stay exactly as you did them. A PROGRAM READY TO GO, OR BUILD YOUR OWN Pick your goal (muscle, strength, fat loss, endurance), your equipment (full gym, dumbbells only, bodyweight), your experience and how many days a week you train. The program comes with weekly set volume, rep ranges, tempo and rest worked out. Don't like an exercise? Swap it for an equivalent one. Or write the whole program yourself. COACH REPORT (PRO) Written by rules from your own log. It doesn't guess, and it never shows a value that wasn't measured. • How the same lift is going on two different days — sets hit on each, side by side. • How many days it took a load you missed to stick. • First set full, later sets dropping: is it the load or the rest? • How many increases came on their own because you hit your targets, and how many you added by hand. • Whether you're doing the same work at a lower average heart rate (with Apple Watch). IT REMEMBERS ITS ADVICE (PRO) When the coach gives advice, it keeps it. At the end of a program, the completion report tells you which advice you followed, how your sets went afterwards and whether anything is still unresolved. Advice that can't be measured yet gets no verdict. The report also exports to PDF. PROGRESS (PRO) Your main lifts week by week, your weekly streak and a summary of the program so far. A stalled lift isn't hidden; the summary tells you how many weeks it has been stuck. YOUR DATA IS YOURS • No account, no ads. • Backups go to your own iCloud Drive (heart rate and calories read from Apple Health stay out of it); restore from there when you switch phones. • Finished workouts are saved to Apple Health; heart rate and active energy are read from Health. • Export every set you've logged as CSV. FREE AND PRO Logging, Apple Watch, automatic progression, Apple Health, iCloud backup and CSV are free; you can keep two programs and generate one program automatically. VOWS Pro unlocks the coach report, Progress analysis, the program completion report and PDF, and removes the program and generation limits. Eligible users get a free trial on the yearly plan. VOWS Pro is an auto-renewing subscription, billed monthly or yearly. It renews automatically unless cancelled at least 24 hours before the end of the current period. Payment is charged to your Apple Account; manage or cancel your subscription in App Store settings. Privacy: https://onurdemirel54-bayt.github.io/vows-legal/privacy.html Terms: https://onurdemirel54-bayt.github.io/vows-legal/terms.html
Stackful
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Stackful helps you keep track of the supplements you have at home and see which ones will run out next. Add a supplement once: how much you have and how much you normally use each day. Stackful estimates how long your stock may last, when it is expected to run out and when it may be sensible to order more. There is no daily logging – the estimate follows your normal daily use. KNOW WHAT YOU HAVE • See your whole Cabinet at a glance, with remaining amounts and days left • Use the unit that matches the product: tablets, capsules, softgels, gummies, grams, scoops, servings, millilitres or your own unit • Pause a supplement you are not using right now, or archive it and keep its history PLAN YOUR NEXT RESTOCK • See an estimated empty date and a suggested order date for each supplement • Next order groups the supplements that are running low, so you can plan one sensible order • Optional stock heads-up: one notification per supplement on its suggested order date – never daily reminders KEEP ESTIMATES CURRENT • Add stock when a new container arrives, even before the current one is empty • Correct the remaining amount or change the daily amount whenever something changes GOING AWAY? • Choose your travel dates to see whether your supplements are estimated to last, and how much of each to pack PRIVATE BY DESIGN • Your data is only stored on this iPhone • No Stackful account, no advertising, no analytics and no Stackful server • Available in English, Norsk bokmål, Español, Deutsch, Français and Português (Brasil) STACKFUL FREE AND STACKFUL PLUS Stackful Free includes up to three supplements in your Cabinet. Paused supplements count; archived supplements don’t. Stackful Plus is an optional one-time purchase that removes that limit. Everything else in Stackful is the same. Payment is charged to your Apple Account when you confirm the purchase. Stackful Plus is a one-time purchase, not a subscription. You can restore it on any iPhone signed in to the same Apple Account. Stackful is an inventory-planning tool. It does not provide medical advice or recommend supplements. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://stackful-app.pages.dev/privacy/
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Verdict
VOWS Training and Stackful 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
Both are free to download. VOWS Training sells 2 in-app purchases, starting at $3.99 per month and Stackful sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
| Parameter | VOWS Training | Stackful |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 days | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, Apple Watch — better | iPhone |
| Requires iOS | 16.4 — better | 17.0 |
| Further details — not scored | ||
| Size | 50 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | onur demirel | Espen Lund |
In-app purchases
VOWS Training
- VOWS Pro Monthly$3.991 Month
- VOWS Pro Yearly14 Days trial$29.991 Year
Stackful
- Stackful Plus$6.99





