snapgains vs 4Level
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
snapgains
Easily track your fitness journey with a dedicated app for progress photos. Compare your physique side-by-side, create time-lapses of your transformation, and maintain privacy as all photos stay on your device. Get weekly check-in reminders to stay accountable.
- Dedicated progress photo timeline
- Side-by-side and overlay photo comparison
- Time-lapse video creation
- Pose matching for accurate comparison
- Private photo storage on device
- Weekly check-in reminders
- Customizable sharing options
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USER-FRIENDLY DESIGN Scroll your check-ins on one simple timeline showing date, weight and pose. No more scrolling through hundreds of random photos trying to remember when you took what. PHOTOS STAY PRIVATE Your photos never leave your device. No account needed, no cloud, no uploads. COMPARE, DON'T GUESS Put any two photos side-by-side, or overlay them and drag a slider to compare changes in your physique. TIME-LAPSE YOUR JOURNEY Turn 6 months of progress into 6 seconds. Few things are more motivating than watching your own transformation play out before your eyes. OVERLAY ANOTHER PHOTO When taking a photo, match your pose to a previous pose so every comparison lines up perfectly. SHARE YOUR WINS Share your comparison shots or time-lapses with friends, coaches, social media. Show your weight and date, or hide them. Blur your face, or don't. NEVER MISS A CHECK-IN Enable notifications so you check-in at least once a week to stay accountable. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: [https://snapgains.app/privacy
4Level
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4Level is made for ambitious amateur athletes who already train regularly and want to know: How fit am I really — and am I sticking to what I set out to do? WHAT 4LEVEL IS — AND WHAT IT IS NOT 4Level analyses the workouts you already record. It does not create training plans, workouts or coaching advice and does not replace a coach. You decide how you train; 4Level measures, explains and keeps you honest. YOUR LEVEL, 1 TO 100 One number from three building blocks: • Fitness — your training load of the last six weeks (CTL) • Capacity — running VO₂max (VDOT) or cycling watts per kilo • Consistency — how regularly you train and, once you set your resolutions, how faithfully you keep them Calculated for every single day back to your first workout, using only what was known on that day. Every value shows whether it was measured or estimated; the whole formula is explained in the app. STICK TO YOUR RESOLUTIONS Set per sport — running, cycling, hiking, swimming, strength — how often and on which days you intend to train, or train as you feel like it. Add weekly, monthly or yearly kilometre targets if you like (not for strength). 4Level shows whether you are ahead or behind right now, a 26-week heatmap, your streak in weeks and your month balance. Flexible by design: ran Monday, Tuesday and Saturday instead of Monday, Wednesday and Friday? The week still counts. Measured retroactively for the last 26 weeks if you want. LOAD, FATIGUE AND FRESHNESS Fitness, fatigue and freshness (CTL, ATL, TSB) show whether you are rested, building or overloaded — judged on the trend of the last days, not on how tired you are right after a session. Race predictions for 5 km to marathon come from your runs of the last 120 days: pace and, if you record it, heart rate. RECOVERY After each session dots fill the gap at the bottom of your level ring; when the ring closes, you are recovered. How long that takes depends on the load and intensity of the session and on your fitness. 4Level also reads resting heart rate, heart rate over the day, HRV and cardio recovery, analyses your history once and adapts the recovery time to how you actually recover — Apple Watch or another device that writes heart rate to Apple Health. A notification when you are recovered is optional. RUNNING, CYCLING AND HIKING Yearly goals with a marker where you should be today, this year against last year and your best year, weekly volume, records, all years at a glance. Plus a searchable list of all your workouts. WORKS WITH THE APPS YOU USE 4Level reads from Apple Health — everything your Apple Watch, Garmin Connect, Strava, Zwift, Wahoo and other apps write there. You choose per sport which app's recording counts; the same session recorded twice counts once, and missing heart rate, climbing or power is filled in from the other recording. PRIVATE BY DESIGN No account, no server, no analytics, no ads. Data is read from Apple Health and stays on your device. PRICING 30 days free with everything included. Afterwards 4Level Pro: a yearly subscription (renews automatically, cancel anytime in your Apple Account settings) or a one-time lifetime licence. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ The level is a training aid, not a medical assessment. Try the demo without any data.
Screenshots
Verdict
The clearest difference is iOS requirement: snapgains at 15.1 against 4Level's 26.1. On price, update cadence, ads and in-app purchases 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. snapgains sells 2 in-app purchases, starting at $4.99 per month and 4Level sells 2 in-app purchases, starting at $1.99 per year. Whichever you choose, the download price is not the number that matters.
snapgains ships an update every 6 days, 4Level weekly. Both last shipped on October 29, 2026.
| Parameter | snapgains | 4Level |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 6 days — better | Weekly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 26.1 |
| Further details — not scored | ||
| Size | 68 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Max Mondelli | Robert Poetzsch |
In-app purchases
snapgains
- Monthly14 Days trial$4.991 Month
- Annual14 Days trial$39.991 Year
4Level
- 4Level Pro Yearly$1.991 Year
- 4Level Lifetime$8.99








