Interview Prep vs Callback
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Interview Prep
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Land the offer. Altair Fellowship is built for students and candidates breaking into elite finance: Investment Banking, Private Equity, Sales & Trading, and Real Estate. Short, sharp quiz sessions you can run between lectures, on the train, or the night before a superday. WHAT YOU GET - Interview Challenge: A multiple-choice gauntlet on your target vertical, with instant explanations so you learn the "why," behind every topic. - Bank-specific drills: Practice by firm and module. Train for the desk you're interviewing with. - Track your edge: Accuracy by vertical and module, automatic weak-spot detection, and one-tap mistake review. COVERAGE - IB ยท Investment Banking - PE ยท Private Equity - ST ยท Sales & Trading - RE ยท Real Estate WHO IT'S FOR University students that are looking for a summer internship, off-cycle and lateral candidates, and anyone prepping technicals for bulge brackets, elite boutiques, and top funds. 11,000+ questions. Start your free trial and crush your next interview. โ Privacy Policy: https://app.altairfellowship.com/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Callback
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Prepare for investment banking interviews. Callback brings technical practice, worked answers and superday rehearsal into one focused study routine. Build your knowledge, identify weaker topics and prepare for the conversation. Built for investment banking, private equity and other finance interviews. An active Callback Pro subscription is required to study in the app and web workspace. KNOW YOUR TECHNICALS Practice accounting, valuation, DCF, M&A, LBOs, capital markets, restructuring, private equity and venture capital. Work through concepts and calculations, save useful questions and return to the areas that need more attention. REHEARSE THE WHOLE DAY Prepare for one interview or a full five-, six- or seven-round superday. Meet distinct fictional interviewers, from junior technical rounds to a senior fit conversation. Each round has its own introduction, focus and pace. Practice spoken answers on iPhone and iPad, with transcription where supported, or use tapped answers. Web interview practice uses typed answers and self-assessment. UNDERSTAND THE WHY Go beyond the correct answer with worked explanations and key takeaways. Ask the AI tutor follow-up questions when you need another way into a concept. The tutor requires sign-in and an internet connection; account usage limits apply across app and web. MAKE YOUR NEXT STEP CLEAR Build a study plan around your role, level and interview date. Follow daily tasks, review weaker topics and see your practice progress. Timed aptitude tests help you prepare for the assessment stage too. ONE ACCOUNT, ACROSS YOUR DEVICES Use the same Apple or Google sign-in on iPhone, iPad and the web to sync supported preferences, saved questions, practice progress and subscription access. Bundled learning material works offline in the app. Syncing, the tutor, purchases and fresh market data require a connection. CALLBACK PRO Pro includes the question library, study plan, timed aptitude tests, mock interviews and AI tutor. Subscription options and prices are shown before purchase. Public interview guides on our website are free to read. Payment is charged to your Apple Account at confirmation. Subscriptions renew automatically unless canceled at least 24 hours before the current period ends. Manage or cancel your subscription in your Apple Account settings. YOUR DATA Signed-in account data and supported study progress sync through Callback's servers. Tutor messages are processed online and retained for conversation history. See our privacy policy for data handling and account deletion details. Independent interview preparation. Not affiliated with a bank or fund. Callback does not guarantee an interview result or job offer. Terms of use: https://callbackai.app/terms Privacy policy: https://callbackai.app/privacy
Screenshots
Verdict
The clearest difference is update cadence: Callback at every 4 days against Interview Prep's fortnightly. Interview Prep's advantage is iOS requirement (16.4 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Interview Prep sells 2 in-app purchases, starting at $6.99 per 7 days and Callback sells 3 in-app purchases, starting at $16.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Interview Prep ships an update fortnightly, Callback every 4 days. The most recent releases landed on October 28, 2026 and October 29, 2026 respectively.
| Parameter | Interview Prep | Callback |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly | Every 4 days โ better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone, iPad โ better |
| Requires iOS | 16.4 โ better | 26.0 |
| Further details โ not scored | ||
| Size | 64 MB | 50 MB |
| Age rating | 4+ | 4+ |
| Developer | Marco Santonocito | Nocte Ventures Ltd |
In-app purchases
Interview Prep
- Altair Weekly3 Days trial$6.997 Days
- Altair Yearly3 Days trial$59.991 Year
Callback
- Callback Pro Weekly$16.997 Days
- Callback Pro (Monthly)$34.991 Month
- Callback Pro (Quarterly)$79.993 Months








