Isobar vs px.
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Isobar
Design and order custom-fit compression socks from home. This app uses your phone's camera to create a 3D model of your legs for a perfect fit, helping to reduce DVT risk and alleviate travel-related leg discomfort.
- Custom compression sock ordering
- 3D leg scanning via mobile video
- Personalized fit and style selection
- Direct-to-door delivery
- DVT risk reduction
- Alleviate heavy legs and jet lag
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Benefit from Isobarβs unmatched Custom Travel Compression Socks, all from the comfort of your own home and delivered to your door with the new Isobar app. Reduce your risk of DVT, alleviate that post-travel heavy-leg feeling and minimise jet lag without compromising your comfort. How it works: β’ Take a video of your legs using your mobile device β’ We generate an accurate 3D model of your unique anatomy β’ Select your style and colour and order through the app β’ Your socks are custom designed to fit you β’ We manufacture your socks to order in Manchester β’ Delivery direct to your door Risks of long haul travel: β’ When we sit for long periods, blood pools in our legs β’ Blood pooling can lead to a blood clot or deep vein thrombosis (DVT) β’ Blood clots can be fatal if not caught and travel to your lungs (pulmonary embolism) β’ 4-10% of long-haul travellers will develop an asymptomatic DVT Why choose Isobar Custom Made Compression Socks: β’ Studies have show off-the-shelf flight socks donβt fit 98% of people β’ 54% had a negative effect because they are too tight β’ Custom made for you to guarantee a perfect fit every time β’ Machine washable and certified to maintain their efficacy after washing β’ Available in a range of colours Proudly developed, designed and manufactured in Manchester, UK. Isobar Compression are official suppliers and partners of: β’ Royal Ballet β’ INEOS Grenadiers Cycling Team β’ British Cycling β’ INEOS Britannia, Challenger of Record for the 37th Americaβs Cup
px.
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For the over-equipped, under-coached. You already have the watch, the apps and the data. What you have never had is a coach that puts it all together and tells you, each day, what to do and why. Tell px what you are working toward: a race, a comeback, more energy for your family. That becomes your pursuit. px builds one plan for your training, mind and food back from it, then reshapes it every day around the day you actually have: how you slept, your work, your family, how you feel. Slept well and a clear calendar? The hard session stays. Short night? It eases off and tells you why. Work ran late and you missed your run? The week rearranges itself, and there is nothing to catch up on. No dashboard of scores to interpret. px makes the call with you, shows you the reason, and you can always change it. Move, Mind and Fuel Move: strength, running, cardio and mobility, built around your goal, your equipment and the time you really have, with guidance on every exercise. Mind: breathwork and meditation chosen for the day you are having, from five minutes. Fuel: meals and recipes that match the work. Log by photo, barcode or search, or just tell px what you ate. Ask px Ask by text or voice, any hour. Can I swim instead of run? I only have twenty minutes. px answers from your plan, your data and what you told it last week, and changes the plan when the answer calls for it. Ask px is AI software, not a person. Your pursuit, start to finish See where you are, what comes next and what you have built since you started: phases, benchmarks, personal bests and milestones. Consistency is counted in weeks held, never streaks. Your numbers, explained Sleep, HRV, resting heart rate and training load, shown beside the decisions px makes from them. When your data cannot support a conclusion, px shows you the gap, never a guess. Works with what you wear Apple Health and the watches, rings and training apps you already own. No watch? Your phone is enough. Side by side Pair with a friend or start a crew of up to twelve. Share progress and personal bests, each of you on your own plan. Your data stays yours Never sold, never used for advertising, and never used by our AI providers to train their models. AI features need your consent, and Private Mode keeps a conversation out of px's memory. Export, pause or delete your data whenever you like. The app and the coach speak 15 languages. px is not a medical device and does not diagnose, treat, cure or prevent any medical condition. Membership Start with a seven-day free trial, once per Apple ID. After it, px needs a membership; there is no free version. Monthly or yearly, everything included. Payment is charged to your Apple ID at confirmation of purchase. Your subscription renews automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel any time in your App Store account settings. Terms of Use (EULA): https://pxmembership.com/terms Privacy Policy: https://pxmembership.com/privacy
Screenshots
Verdict
The clearest difference is in-app purchases: Isobar at none against px.'s 2. px.'s advantage is update cadence (every 4 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. px. sells 2 in-app purchases, starting at $29.99 per month. Isobar asks for nothing beyond the download.
Isobar ships an update every 2 months, px. every 4 days. The most recent releases landed on November 4, 2026 and November 9, 2026 respectively.
| Parameter | Isobar | px. |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | β |
| Update frequency | Every 2 months | Every 4 days β better |
| Ads | No | No |
| In-app purchases | No β better | Yes |
| Monetization | Free | β |
| Devices | iPhone, iPad | iPhone, iPad, Apple Watch β better |
| Requires iOS | 16.4 | 16.4 |
| Further details β not scored | ||
| Size | 73 MB | 262 MB |
| Age rating | 4+ | 17+ |
| Developer | Advanced Therapeutic Materials Ltd | Pursue Excellence Ltd |
In-app purchases
Isobar
No in-app purchases
px.
- px membership: monthly7 Days trial$29.991 Month
- px membership: annual7 Days trial$199.001 Year









