Robertt vs Aim2Build
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Robertt
Control a robot named Robert via Bluetooth for various interactive functions. You can remotely operate its movements, make it sing and dance, and even create custom dance routines.
- Bluetooth connectivity
- Remote control interface
- Singing functionality
- Dancing capabilities
- Dance editing
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Connecting with Robert through Data Bluetooth and Audio Bluetooth, Robert can be controlled by remote control page, singing, dancing for you, and editing dance for Robert.
Aim2Build
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Aim2Build helps you get more from your LEGO collection. Instead of searching through instructions, Aim2Build starts with your inventory and shows you which sets you can build — and how close you are to completing others. What you can do - Add and save your LEGO inventory - See clear buildability percentages - Find sets you can already build or are close to finishing - View missing parts at a glance Aim2Build is designed to be fast, simple, and practical — whether you’re a casual builder or a serious collector. The web version is free to explore. The iOS app offers optional Pro features for users who want deeper insights and faster decisions.
Screenshots
Verdict
The clearest difference is iOS requirement: Robertt at 11.0 against Aim2Build's 15.1. 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. Neither carries in-app purchases, so what you see is what you pay.
Robertt ships an update every 2 weeks, Aim2Build every 3 weeks. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.
| Parameter | Robertt | Aim2Build |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (19 ratings) — better | — |
| Positive reviews | 61.5% of reviews | — |
| Number of ratings | 19 — better | — |
| Update frequency | Every 2 weeks — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 11.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 192 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | 红 苗 | AIM2 LTD |
In-app purchases
Robertt
No in-app purchases
Aim2Build
No in-app purchases
