Cactus vs NumbBrain
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Cactus
An AI-powered assistant designed to help you manage your day, capture ideas, and organize tasks. It offers natural language interaction, voice input, and secure cloud synchronization for seamless productivity.
- AI-powered assistant
- Natural language interaction
- Voice capture for ideas
- Task organization
- Schedule management
- Secure cloud sync
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Cactus is an AI memory sidekick for the tasks, dates, promises, and personal details you do not want to forget. Press the microphone and speak naturally. Cactus can save a reminder, organize a task, remember an important detail, and help you prepare before something is due. SPEAK IT. CACTUS SAVES IT. • Save reminders and important details by voice • Turn plans and deadlines into organized tasks • Find tasks by today, tomorrow, next week, next month, or later • Ask Cactus about information you previously saved • Type instead whenever speaking is not convenient PREPARE BEFORE IT BECOMES URGENT Cactus can suggest a useful next step when preparation would genuinely help. Mention an upcoming birthday, for example, and Cactus may offer to create a task for choosing a gift. Routine reminders stay simple. YOUR DAY, ORGANIZED Review tasks, calendar plans, and saved memories in one place. Cactus helps you see what is due now and what is coming next. PRIVATE ICLOUD SYNC Your Cactus archive is stored on your devices and mirrored through your private iCloud account so it can stay in sync across your Apple devices. Cactus does not use a public or shared memory database. Voice and message content is sent securely to the AI service when needed to transcribe speech or provide a response. Cactus Premium includes a 7-day free trial, followed by a recurring subscription. Your exact local price and renewal terms are shown before purchase. Terms of Use: https://cactus-site.vercel.app/terms Privacy Policy: https://cactus-site.vercel.app/privacy
NumbBrain
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Reduce screen time without deleting the apps you still need. NumbBrain helps you block distracting apps and app categories during work, study, reading, bedtime, or any focus routine you want to protect. Use NumbBrain to: - Block selected apps and app categories - Create automatic focus schedules - Set rules for weekdays, weekends, nights, or custom routines - Unlock only when you really need a short break - Review screen time stats and understand what pulls your attention NumbBrain is designed for people who want stronger app limits, fewer distractions, and a calmer phone. In-App Purchase: Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. You can manage and cancel subscriptions in your App Store account settings. Email jiangdi0924@gmail.com Terms: https://jdi-app.notion.site/Terms-5a99ba5bf942491b8299c07221bb5f7b Privacy: https://jdi-app.notion.site/Privacy-Policy-cdb1be6b87f64c06b7dbea6ffbbad83f
Screenshots
Verdict
The clearest difference is update cadence: Cactus at weekly against NumbBrain's every 4 months. On price, ads, in-app purchases 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. Cactus sells 1 in-app purchase, starting at $4.99 per month and NumbBrain sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
Cactus ships an update weekly, NumbBrain every 4 months. The most recent releases landed on July 24, 2026 and September 15, 2026 respectively.
| Parameter | Cactus | NumbBrain |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Weekly — better | Every 4 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 2 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Feidong Song | 笛 姜 |
In-app purchases
Cactus
- Premium plan.$4.991 Month
NumbBrain
- Monthly Premium$0.991 Month
- Annual Premium14 Days trial$2.991 Year
- Lifetime Premium$5.99









