Solves vs MAPP365
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Solves
A powerful and versatile calculator for all your Apple devices. Edit complex expressions, sync history across devices, and enjoy a clean, ad-free experience. Unlock advanced features like unit conversion and fraction support with an optional upgrade.
- Edit expressions without limitations
- Instant results
- Sync calculation history across devices
- Unit conversion (currencies, physical units)
- Fraction support
- Customizable themes
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Solves is a well-made calculator app for your iPhone, iPad, Mac, and Apple Watch. It allows you to edit expressions without limitations and get instant results. It keeps your calculation history in sync on all devices and lets you to easily interact with it. All this for free and without ads! By purchasing Solves+ you also get: • Unit Conversions: currencies (with crypto, metals & energy), physical units, and your own! • History Tools: comment, bookmark, export, auto clear, and more • Fractions • More Themes • Advanced Settings Hand-typed code. No generative AI was used during the development or by the app itself. Solves+ requires one payment only. You will own it forever on all devices.
MAPP365
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MAPP365 is a professional mobile application designed to assess, document, and improve vaccination quality in poultry hatcheries. It supports technical, veterinary, and quality teams by transforming onsite observations into structured data, clear reports, and actionable insights that connect hatchery practices to field performance. The application guides users through the vaccination audit value stream—from planning and conducting hatchery visits to reviewing results and defining improvement actions. Audits are performed directly in the hatchery, with standardized evaluations of vaccination processes, equipment, handling, and chick quality. Data, notes, and photos are securely captured in the field, even when working offline. MAPP365 automatically consolidates audit data and generates objective, easytounderstand reports. These reports support factbased discussions with hatchery teams, helping identify root causes, reduce uncertainty, and agree on practical actions such as training, equipment adjustments, or process improvements. Over time, stored history enables comparison, benchmarking, and monitoring of vaccination quality trends. By standardizing vaccination audits and improving data transparency, MAPP365 helps hatcheries reduce risk, improve consistency, and strengthen the link between correct vaccination and better poultry performance in the field. Key features include: • Structured vaccination and chick quality assessments • Standardized checklists to reduce subjectivity in audits • Notes and photo documentation linked to audit questions • Automated generation of clear, professional reports • Historical data storage and benchmarking over time
Screenshots
Verdict
The clearest difference is in-app purchases: MAPP365 at none against Solves's 6. Solves's advantage is device support (5 vs 1) and iOS requirement (15 vs 26.1). On price, update cadence 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. Solves sells 6 one-off in-app purchases. MAPP365 asks for nothing beyond the download.
Solves ships an update every 3 weeks, MAPP365 every 2 months. The most recent releases landed on October 8, 2026 and October 5, 2026 respectively.
| Parameter | Solves | MAPP365 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (382 ratings) — better | — |
| Positive reviews | 90.6% of reviews | — |
| Number of ratings | 382 — better | — |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod, Mac, Apple Watch — better | iPad |
| Requires iOS | 15 — better | 26.1 |
| Further details — not scored | ||
| Size | 82 MB | 18 MB |
| Age rating | 4+ | 17+ |
| Developer | Oleg Barinov | Merck Sharp & Dohme LLC |
Bugs and requests
Solves
Reported bugs
4 issues- Crashes when pressing certain buttons
- Issues with parsing complex expressions
- Incorrect results for some calculations
- Problems with history clearing or syncing
Requested features
6 requests- Add support for fractions and mixed numbers
- Implement a widget for quick access
- Allow resizing the app window on Mac
- Provide more customization options
- Add support for Apple Watch
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- Improve unit conversion experience
MAPP365
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Solves
- Tip Option #1$0.99
- Tip Option #2$1.99
- Tip Option #3$4.99
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- Tip Option #4$9.99
- Solves+$9.99
- Tip Option #5$19.99
MAPP365
No in-app purchases









