在家画画HD vs Filter Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
在家画画HD
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听经典绘本-培养宝宝阅读习惯，画原创绘本-提高孩子艺术素养。 “宝贝计画”是一个儿童美育平台，有超过10000部有声绘本，包括经典绘本、原创绘本、英文绘本，用户也可以录制绘本上传；还有大量的绘本美育公开课，可以随时随地学习艺术提高审美，用“美”连接亲子关系，让孩子在艺术中遇见自己！
Filter Calculator
Design various types of electronic filters, including RC, RL, RLC, and passive crossovers, with customizable orders and alignments. Instantly obtain component values and Bode insights for lab, classroom, or audio projects. Ideal for engineers, hobbyists, and students.
- Design RC, RL, and RLC filters (2nd-7th order)
- Butterworth & Chebyshev alignments
- Passive crossover calculations
- Twin-T notch filter design
- Instant component values
- Bode insights
- Offline-friendly dark mode UI
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Design RC, RL, and RLC filters (2nd–7th order) with Butterworth & Chebyshev alignments, passive crossovers, RLC band-pass/reject, and Twin-T notch—enter specs to instantly get component values and quick Bode insights in a clean, offline-friendly, dark-mode UI for lab, classroom, and audio/embedded work. What you can design: -RC & RL filters: low-pass / high-pass, 2nd–7th order -RLC filters: band-pass & band-reject (notch) -Butterworth: maximally flat magnitude -Chebyshev: ripple-tuned sharpness -Twin-T notch: precise mains or tone suppression -Passive crossovers: 2-way/3-way starter calculations Built for engineers, hobbyist and students, it turns specs into trustworthy parts fast—so you can prototype smarter, learn by tweaking, and move from idea to BOM with confidence.
Screenshots
Verdict
The clearest difference is ads: 在家画画HD at none against Filter Calculator's shown. 在家画画HD also leads on update cadence (every 6 weeks vs every 5 months) and iOS requirement (8.0 vs 15.0). Filter Calculator's advantage is device support (3 vs 1). On price 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. 在家画画HD sells 3 one-off in-app purchases and Filter Calculator sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
在家画画HD ships an update every 6 weeks, Filter Calculator every 5 months. The most recent releases landed on October 9, 2026 and October 13, 2026 respectively.
| Parameter | 在家画画HD | Filter Calculator |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| Update frequency | Every 6 weeks — better | Every 5 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 33 MB | 53 MB |
| Age rating | 4+ | 4+ |
| Developer | 北京绘本原创教育科技有限公司 | Anas Abubakar |
In-app purchases
在家画画HD
- 12绘画币$1.99
- 30绘画币$4.99
- 108绘画币$15.99
Filter Calculator
- Upgrade to Pro$2.99
Questions
Is 在家画画HD free?
Is Filter Calculator free?
Do 在家画画HD or Filter Calculator have ads?
Which is updated more often, 在家画画HD or Filter Calculator?
Other comparisons
