4 Plus 4 vs Rehearse
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
4 Plus 4
This app offers a clear, step-by-step approach to learning mathematics. It features structured modules for number basics, arithmetic, and fractions, with playful sections to apply learned concepts. Designed to make math understandable and enjoyable, it's ideal for beginners and for refreshing knowledge.
- Clear learning modules
- Step-by-step guidance
- Structured practice
- Playful application sections
- Progress tracking
- Ad-free experience
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Math often feels complicated. Not because it’s hard, but because it’s explained the wrong way. 4 Plus 4 is different. No overloaded explanations, no distractions, and no shortcuts. Just clear tasks that guide you forward step by step. The app is ad-free and does not collect personal data. It is built around clear learning modules such as Number Basics, Advanced Numbers, Basic Arithmetic and Fractions Basics, where key mathematical concepts are practiced in a structured and easy-to-follow way. In additional sections, you can apply what you have learned in a playful and entertaining way. 4 Plus 4 combines clear learning with motivation, progress, and fun — ideal for getting started, refreshing knowledge, or practicing in between. We continuously expand the app with new content to make learning mathematics as simple, understandable, and enjoyable as possible.
Rehearse
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Some conversations you rehearse in your head for a week and still fumble. Rehearse lets you say them out loud first — to someone who answers back. HOW IT WORKS Pick the conversation you have been putting off. Talk to a character who pushes back the way the real person will: the manager who glances at the time, the report who explains before you finish the sentence, the director who restates rather than rethinks. Then get told, specifically, how it landed and what to try next. THIRTY SITUATIONS, WRITTEN FOR A FIRST-TIME MANAGER • Saying no — to your own manager, to a deadline set by a press release, to the same request asked twice • Difficult people — the defensive report, the one who goes over your head, the colleague who will not use the new tools • Feedback — your first critical conversation, telling your boss a target is not real, answering a question about pay • Standing up for your team — one headcount and two teams, the favour that is really a project • Hard moments — the week after layoffs, a report asking about AI, enforcing a policy you did not choose, someone good who just resigned OR WRITE YOUR OWN Describe the conversation you are dreading and the person you are having it with. Say when it is happening, and it counts down to the day. A CARD TO TAKE IN WITH YOU Every rehearsal writes one: your opening line, the thing you will not trade away, and what to say to the three ways they are most likely to push back. Open it outside the room. THEN THE PART NOTHING ELSE DOES On the day, Rehearse asks about the REAL conversation — not the rehearsal. Whatever you learned comes back as coaching the next time you practise it. VOICE OR FACE TO FACE Talk by voice anywhere, or switch on a lifelike, lip-synced face that reacts while you speak. Voice costs a fifth of the credits. WHAT YOU GET BACK A score out of 100, four dimensions scored out of five, the full transcript, and badges that track how much you have practised — never what you practised. Credits are the only limit. Every scenario is open to everyone. Subscriptions (Voice, Pro, Coach) renew automatically every month or year until cancelled. Payment is charged to your Apple ID when you confirm the purchase. Cancel any time in Settings → your name → Subscriptions, at least 24 hours before the current period ends. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Service: https://rehearseapp.vercel.app/terms/ Privacy Policy: https://rehearseapp.vercel.app/privacy/
Screenshots
Verdict
The clearest difference is update cadence: Rehearse at every 2 days against 4 Plus 4's monthly. 4 Plus 4's advantage is iOS requirement (13.0 vs 15.0). On price, rating, ratings volume and ads 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. 4 Plus 4 sells 1 one-off in-app purchase and Rehearse sells 10 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for 4 Plus 4 against 5.0 for Rehearse. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
4 Plus 4 ships an update monthly, Rehearse every 2 days. The most recent releases landed on October 15, 2026 and October 24, 2026 respectively.
| Parameter | 4 Plus 4 | Rehearse |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 | 1 |
| Update frequency | Monthly | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 38 MB | 89 MB |
| Age rating | 4+ | 17+ |
| Developer | Patrick Koehnen | XCELAUDIT TECHNOLOGIES LLP |
In-app purchases
4 Plus 4
- All Inclusive$1.99
Rehearse
- Voice Monthly$9.991 Month
- Pro Monthly$19.991 Month
- Coach Monthly$39.991 Month
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- Voice Annual$79.991 Year
- Pro Annual$159.991 Year
- Coach Annual$319.991 Year
- 50 Credits$5.99
- 150 Credits$14.99
- 350 Credits$29.99
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- 1000 Credits$79.99









