Image converter vs MathAlarm
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Image converter
Effortlessly convert multiple image files between various formats with a simple, intuitive interface. Reduce file sizes for easier sharing and enjoy local processing for enhanced privacy. Supports a wide array of input and output options.
- Batch image conversion
- Supports numerous formats
- Local image processing
- Image resizing
- Adjustable quality settings
- User-friendly interface
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Easily batch convert your image formats with simple operations. Supporting a wide range of major formats, this app is perfect for any situation. With its simple and intuitive design, anyone can start using it right away. You can also reduce image file sizes, making it convenient for posting on social media or sending via email. Privacy-Focused Design All image processing is performed locally on your device. Your photos and documents are never uploaded to our servers, ensuring your personal content remains private. The app only uses internet connection for displaying ads - your images always stay on your device. ● Supported Input Formats JPEG, PNG, GIF, BMP, WebP, TIFF, PSD, Targa, PVR, ICO, HEIC, HEIF ● Supported Output Formats JPEG, PNG, GIF, WebP, Targa, ICO, PDF Features: - No registration required. Ready to use right after download. - Local image processing - your files never leave your device. - Simple and user-friendly interface. - Supports a wide range of formats. - Batch convert multiple images at once. - Image resizing feature. - Adjustable quality (for JPEG and WebP only). - Selectable save destination. - Built-in sharing function. - Real-time conversion progress display. - Beautiful, modern application design.
MathAlarm
This alarm app requires users to solve math problems to turn it off, ensuring they are fully awake. It offers customizable settings for repeat schedules, difficulty levels, and alert types, all managed directly on your wrist.
- Solve math problems to stop alarm
- Customizable repeat schedules
- Four difficulty levels
- Haptic or Sound + Vibrate alerts
- Multiple independent alarms
- Runs entirely on Apple Watch
- No iPhone required
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Wake up. Actually wake up. MathAlarm is an alarm that won't let you drift back to sleep. To dismiss it, you have to correctly solve a math problem — no more silencing it half-asleep and rolling over. Works with or without an Apple Watch: • With an Apple Watch, the alarm rings on your wrist and your iPhone is the backup. If you don't solve it on the Watch, the iPhone alarm keeps ringing until you do. • Without an Apple Watch, the alarm rings on your iPhone at the time you set. Set alarms with: • Repeat schedules — once, or any combination of weekdays • Four difficulty levels — Easy, Medium, Hard, and Expert • Haptic Only or Sound + Vibrate alerts • Multiple independent alarms, each configured separately • Skip the next alarm with one tap When the alarm fires, you're shown a math problem with four multiple-choice answers. Get it right and the alarm stops. Get it wrong and a fresh problem appears — you have to actually think before you can go back to sleep. Alarms sync between your iPhone and Apple Watch. No account, no subscription. Add a MathAlarm complication to your watch face for a quick glance at your next alarm. No ads. No tracking. No subscriptions — just an alarm that makes sure you're really awake.
Screenshots
Verdict
The clearest difference is price: Image converter at Free against MathAlarm's $0.99. Image converter also leads on ratings volume (30 vs 2) and iOS requirement (14.0 vs 26.0). MathAlarm's advantage is review sentiment (100% vs 58%) and ads (none vs shown). On 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
Image converter is free to download; MathAlarm costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
MathAlarm holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Image converter has 30 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 58% of Image converter's written reviews are positive against 100% of MathAlarm's.
Image converter ships an update every 2 months, MathAlarm every 3 weeks. The most recent releases landed on November 11, 2026 and November 5, 2026 respectively.
| Parameter | Image converter | MathAlarm |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.6 (30 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 57.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 30 — better | 2 |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 14.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 45 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Yoshinobu Ikeda | Discipline Labs LLC |
Customer experience
Image converter
MathAlarm
In-app purchases
Image converter
No in-app purchases
MathAlarm
No in-app purchases
Questions
Is Image converter free?
Is MathAlarm free?
Which has better reviews, Image converter or MathAlarm?
Do Image converter or MathAlarm have ads?
Which is updated more often, Image converter or MathAlarm?
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