Kindoo vs Marbles in a Jar
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kindoo
Transform any electric door into a smart door using your smartphone. This system combines proprietary hardware with a mobile application to provide convenient remote access without altering existing locks.
- Remote door control
- Smartphone integration
- Smart door conversion
- No lock changes required
- Proprietary hardware system
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Use the KINDOO App to control your electric door right from your smartphone. The KINDOO system consists of the KIN (proprietary hardware) and the KINDOO app that work together to make any electric door smart, without the need to change your locks.
Marbles in a Jar
This app allows you to create a virtual marble jar to track progress, rewards, or habits. Customize jar and marble sizes, and enjoy realistic 3D physics for interactive play. It's a versatile tool for personal motivation or as a virtual swear jar.
- Virtual marble jar for tracking
- Customizable jar and marble sizes
- Realistic 3D physics
- Interactive marble play
- Progress tracking for rewards
- Virtual swear jar functionality
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PUT MARBLES IN A JAR: Use the marble jar to keep track of whatever you like, e.g when you do something good, feel good or deserve a boost by gradually building towards a reward! Break things down into small pieces and track your progress. Or use it as a virtual swear jar. The uses are limited only by your imagination. VIRTUAL INTERACTIVE MARBLE JAR: Marble jar reward system. Excellent for parents, teachers or families. Customizable jar sizes from five to one hundred marbles! Number and color of marbles is stored on the phone. LOSE YOUR MARBLES... AND GET THEM BACK AGAIN! Realistic 3D physics! Marbles respond to gravity. Play with the marbles and rattle them around in the jar! FREE! NO ADS! Fully functioning free app! Optional in app purchase to unlock choice of marble colors and support development. Preview music by audionautix.com.
Screenshots
Verdict
The clearest difference is in-app purchases: Kindoo at none against Marbles in a Jar's 1. Kindoo also leads on ratings volume (38 vs 6). Marbles in a Jar's advantage is review sentiment (80% vs 47%) and update cadence (every 4 days vs monthly). On price, rating, 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
Both are free to download. Marbles in a Jar sells 1 one-off in-app purchase. Kindoo asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 3.6 for Kindoo against 3.5 for Marbles in a Jar. That said, the two scores are not equally well evidenced: Kindoo has 38 ratings behind it against 6, so its average is the more settled of the two. Written reviews are what separate them: 47% of Kindoo's written reviews are positive against 80% of Marbles in a Jar's.
Kindoo ships an update monthly, Marbles in a Jar every 4 days. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.
| Parameter | Kindoo | Marbles in a Jar |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (38 ratings) — better | 3.5 (6 ratings) |
| Positive reviews | 47.4% of reviews | 80.0% of reviews — better |
| Number of ratings | 38 — better | 6 |
| Update frequency | Monthly | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 8.0 — better |
| Further details — not scored | ||
| Size | 53 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | KINDOO LLP | Thomas Aref |
Customer experience
Kindoo
Marbles in a Jar
In-app purchases
Kindoo
No in-app purchases
Marbles in a Jar
- Choose Marble Color$2.99
