Comparison

Lactate Express vs tweena

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

Head to head
About

Lactate Express

This app enables performance diagnosticians and endurance athletes to conduct precise lactate step-tests. It offers scientifically recognized models for computing thresholds and generating training zones, replacing manual spreadsheet methods. The app supports automatic data capture via Bluetooth and generates professional, branded PDF reports.

Highlights
  • Precise lactate step-test capture
  • Multiple scientifically recognized threshold models
  • Automatic Bluetooth data readings
  • Generation of applicable training zones
  • Professional branded PDF reports
  • Comparison and tracking of tests over time
  • AI-powered personalized training plans
Features
Read full description

Lactate Express brings the lactate step-test to iPad, Mac, and iPhone — built for performance diagnosticians and serious endurance athletes. Capture every step-test precisely, compute thresholds with scientifically recognized models, and turn them into training zones you can actually apply. No more error-prone spreadsheets and manual entry. CAPTURE — fast and error-free • Step-test one step at a time: load (watts or km/h), lactate, heart rate, and Borg per step • Automatic readings over Bluetooth: SensCore lactate meters and Polar heart-rate sensors • Clear phases: rest, examination, recovery — with the current step clearly marked • Large input fields and one-tap entry, even under time pressure during a test ANALYZE — scientifically grounded • Six threshold models: Mader (4.0 mmol/l), Dickhuth, LT1, dMax, dMaxMod, and user-defined fixed values • Automatic curve fitting with coefficients and R² — the math stays transparent • Training zones such as GA1, GA2, and EB at a glance • Publication-grade charts REPORT — professional • Branded PDF reports with header and footer, charts, tables, and zones • Share via the native iOS and macOS share sheet COMPARE & TRACK — over time • Compare Tests: put any two step-tests side by side (Mac and iPad) to see exactly what changed • Home dashboard with threshold trends and deltas — an athlete's form at a glance • Roster overview to manage many athletes from one place (Team/Pro) • Cohort percentiles: see where an athlete ranks within the group TRAIN — with a plan • Training plan straight from your training zones • Personalized training plans from Jo, the mesics AI assistant (with a subscription) FIND — diagnostics near you • Diagnostician Map: performance diagnosticians near you at a glance EDUCATION • Education access for partner workshops: the full feature set for the length of your course, unlocked with a code or QR code — no subscription, no payment details WHO IT'S FOR • Diagnosticians: fast capture, athlete management, professional reports • Athletes: clear zones instead of jargon, an honest performance snapshot PLATFORMS Native SwiftUI — optimized for iPad and Mac, compact on iPhone, and ready for iPhone Duo: the outer display when closed, the large inner display when open. SUBSCRIPTIONS Lactate Express offers auto-renewable subscriptions with monthly and yearly terms. The subscription title, duration and price are shown in the app before purchase. Payment is charged to your Apple Account at confirmation of purchase. A subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period; your Apple Account is charged for renewal within 24 hours prior to the end of the current period. You can manage or cancel your subscription in your Apple Account settings after purchase. Privacy Policy: https://www.lactate-express.de/lactate-express-policy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Lactate Express — train smarter, not harder.

About

tweena

Features
Read full description

tweena ist die App für Tennisvereine: Training, Anmeldungen, Mannschaften und Live-Tennis deines Vereins an einem Ort. Beim ersten Start wählst du deinen Verein aus der Liste (Suche nach Name oder Ort) oder scannst den QR-Code vom Aushang. Danach öffnet tweena direkt die Seiten deines Vereins. Mehrere Vereine lassen sich merken und schnell wechseln. • Training: Gruppen, Platzbelegung, Wochenplan und Anmeldungen zu Kursen und Camps • Für Trainer: Einteilung, Anwesenheit, Vertretungen und Mitteilungen an die Gruppe • Push-Benachrichtigungen bei Planänderungen, Erinnerungen und Neuigkeiten • Live-Scores, Streams und Aufzeichnungen (je nach Verein) • Mannschaften, Tabellen und Spielpläne aus nuLiga • Mein Bereich: deine Gruppen, Termine und Favoriten Jeder Verein hat seine eigene, getrennte Instanz. Keine Werbung, kein Tracking.

Screenshots

Lactate Express2 screens
tweena4 screens

Verdict

The call

The clearest difference is in-app purchases: tweena at none against Lactate Express's 4. tweena also leads on iOS requirement (15.0 vs 17.5). Lactate Express's advantage is update cadence (every 3 weeks vs every 5 months). On price, 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. Lactate Express sells 4 in-app purchases, starting at $24.99 per month. tweena asks for nothing beyond the download.

UpkeepUpdate frequency

Lactate Express ships an update every 3 weeks, tweena every 5 months. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

Scorecard3 real differences · 5 level
Lactate Express versus tweena: the parameters behind the verdict, then further details
ParameterLactate Expresstweena
PriceFreeFree
Positive reviews37.5% of reviews—
Update frequencyEvery 3 weeks — betterEvery 5 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS17.515.0 — better
Further details — not scored
Size135 MB2 MB
Age rating4+4+
DeveloperCOPAtec GmbHAnton von Keussler

In-app purchases

4 purchases

Lactate Express

Subscriptions4
  • Teams (Monthly)$24.991 Month
  • Professionals (1 Month)$44.991 Month
  • Teams (Yearly)$250.001 Year
Show 1 more
  • Professionals (Yearly)$399.001 Year
None

tweena

No in-app purchases

Questions

Is Lactate Express free?
Lactate Express is free to download, with in-app purchases available.
Is tweena free?
tweena is free to download, with no in-app purchases.
Do Lactate Express or tweena have ads?
Neither Lactate Express nor tweena shows ads.
Which is updated more often, Lactate Express or tweena?
Lactate Express ships an update every 3 weeks, and tweena every 5 months. Most recently, Lactate Express was updated on November 3, 2026 and tweena on November 5, 2026.

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