Comparison

Image converter vs MathAlarm

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Batch image conversion
  • Supports numerous formats
  • Local image processing
  • Image resizing
  • Adjustable quality settings
  • User-friendly interface
Features
Read full description

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.

About

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.

Highlights
  • 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
Features
Read full description

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

Image converter4 screens
MathAlarm4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard8 real differences · 2 level
Image converter versus MathAlarm: the parameters behind the verdict, then further details
ParameterImage converterMathAlarm
PriceFree — better$0.99
Rating4.6 (30 ratings)5.0 (2 ratings) — better
Positive reviews57.9% of reviews100.0% of reviews — better
Number of ratings30 — better2
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS14.0 — better26.0
Further details — not scored
Size45 MB4 MB
Age rating4+4+
DeveloperYoshinobu IkedaDiscipline Labs LLC

Customer experience

Image converter

All ratings30 ratings
Positive90.0%
Neutral0.0%
Negative10.0%
Written reviews19 reviews
Positive57.9%
Neutral0.0%
Negative42.1%

MathAlarm

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Image converter

No in-app purchases

None

MathAlarm

No in-app purchases

Questions

Is Image converter free?
Image converter is free to download, with no in-app purchases.
Is MathAlarm free?
MathAlarm costs $0.99, with no in-app purchases.
Which has better reviews, Image converter or MathAlarm?
MathAlarm is rated higher. Image converter averages 4.6 out of 5 from 30 ratings, while MathAlarm averages 5.0 from 2 ratings.
Do Image converter or MathAlarm have ads?
Image converter shows ads; MathAlarm does not.
Which is updated more often, Image converter or MathAlarm?
Image converter ships an update every 2 months, and MathAlarm every 3 weeks. Most recently, Image converter was updated on November 11, 2026 and MathAlarm on November 5, 2026.

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