Comparison

Spacebooker vs Founta Lab

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

Head to head
About

Spacebooker

Features
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Spacebooker ist die kostenlose und smarte Lösung für Tennisvereine. Die App ermöglicht eine blitzschnelle und intuitive Platzbuchung in unter fünf Sekunden – bequem per Smartphone oder am Desktop. Doch Spacebooker ist mehr als nur ein reines Buchungssystem: Wir bringen Menschen zusammen. Mit der integrierten Spielpartnersuche und der Chat-Funktion stärkt Spacebooker das soziale Miteinander im Verein. Spielerinnen und Spieler finden mühelos zueinander – ein unschätzbarer Vorteil besonders für Neumitglieder oder Tennis-Rückkehrer*innen. Für Vereinsverantwortliche bietet das Admin-Panel die volle Kontrolle bei minimalem Aufwand. Verwalte Einzel- und Dauerbuchungen, organisiere deine Mitglieder, nutze den Vereins-Chat und erstelle individuelle Gruppen mit eigenen Buchungsregeln. Spacebooker vereint effiziente Organisation und eine lebendige Gemeinschaft in einer einzigen App – klar, schnell und absolut benutzerfreundlich.

About

Founta Lab

Features
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Founta Lab is the recording app of the Founta research project: together we are building a dataset of tennis serves used to train serve-analysis models. Record your own serves right on the court. Your clips upload automatically and robustly — even on a poor connection — and enter the research corpus once you confirm them. You always see what happens with your footage: upload status, detected serves, and your contribution on the team leaderboard. ACCESS BY APPROVAL ONLY Founta Lab is a research project, not an open social network. After signing in with Apple you need an access code, or a manual approval by our team. That is how we make sure nobody — especially no minors — ends up in the dataset without deliberate, verified consent. No code yet? Write to us: contact@tkmedia.lu FEATURES • Guided serve recording with automatic on-device serve counting • Automatic upload that resumes after connection drops • Your recordings at a glance: status, detected serves, points • Leaderboard and team goals for approved members • Player profiles for children — created and managed exclusively by parents or guardians, with explicit consent • Delete your account any time, directly in the app PRIVACY Your footage is used exclusively for research on serve-analysis models — never for advertising and never sold to third parties. Details: https://founta-labeling-privacy.vercel.app/datenschutz Operated by TK MEDIA S.à r.l.-S, Luxembourg.

Screenshots

Spacebooker3 screens
Founta Lab4 screens

Verdict

The call

The clearest difference is ads: Founta Lab at none against Spacebooker's shown. Spacebooker's advantage is device support (3 vs 1) and iOS requirement (14.0 vs 18.0). On price, update cadence 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on November 4, 2026 and October 29, 2026 respectively.

Scorecard3 real differences · 3 level
Spacebooker versus Founta Lab: the parameters behind the verdict, then further details
ParameterSpacebookerFounta Lab
PriceFreeFree
Update frequencyEvery 2 weeksEvery 2 weeks
AdsYesNo — better
In-app purchasesNoNo
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS14.0 — better18.0
Further details — not scored
Size59 MB139 MB
Age rating4+4+
DeveloperSpacebooker GmbHTun Keltesch

In-app purchases

None

Spacebooker

No in-app purchases

None

Founta Lab

No in-app purchases

Questions

Is Spacebooker free?
Spacebooker is free to download, with no in-app purchases.
Is Founta Lab free?
Founta Lab is free to download, with no in-app purchases.
Do Spacebooker or Founta Lab have ads?
Spacebooker shows ads; Founta Lab does not.
Which is updated more often, Spacebooker or Founta Lab?
Spacebooker ships an update every 2 weeks, and Founta Lab every 2 weeks. Most recently, Spacebooker was updated on November 4, 2026 and Founta Lab on October 29, 2026.

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