JPG Optimizer vs 4S Camera
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
JPG Optimizer
Effortlessly reduce the file size of your photos with minimal quality loss. This app utilizes advanced compression techniques and a unique noise optimization algorithm to make your images smaller, perfect for sharing or saving space.
- Compress and resize photos
- Batch compression
- Adjustable compression quality
- ISO Noise Optimization
- Save and share as JPEGs
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Tired of emails bouncing back because your photos are too big? Want to reclaim gigabytes of storage without deleting a single memory? JPG Optimizer makes your images as small as possible — while keeping every bit of quality you see. Completely private. Completely on your device. Tiny files. Same stunning photos. You'll love it because: • Email attachments finally go through — no more rejections • Free up massive space without losing a single shot • Optimize entire batches with one set of settings • Tap to compare, pinch to inspect, then share with confidence Next-level compression: • Jpegli: up to 35% smaller at high quality — still a normal JPEG • ISO noise reduction for cleaner, lighter files • Full quality control in your hands • Keep or remove EXIF / GPS data (JPEG) • Save as JPEG or WebP Smart resizing: • Ready-to-use presets or custom width × height • Fit with optional colored margins, or Crop precisely • Choose Original, Portrait, or Landscape orientation Import from anywhere: • Library, Files, Camera — even Document Camera for scanning photos and documents Compare with ease: • Tap to switch between original and compressed versions • Pinch-to-zoom stays perfectly aligned Share your way: • Single images, ZIP archive, or PDF • Save directly to a Photos album Zero uploads. Zero accounts. Zero compromises. Your photos stay yours and only yours. Try it now — and be amazed at what you've been missing! FREE AND PRO • Free: up to 3 photos at a time, shared as JPEG • PRO: unlimited photos, WebP, ZIP and PDF, plus Fit/Crop resize with margins
4S Camera
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4S Camera lets you turn off, one by one, seven kinds of automatic “processing” that today’s iPhone applies when you take a photo. Have you ever felt that a photo looked different from what you saw — too bright, too sharp, a little unnatural? When you press the shutter, iPhone often combines multiple frames, lifts shadows, and sharpens edges automatically. Stock Camera settings do not let you turn those off item by item. 4S Camera is for shooting with that automatic processing turned off. It is not an app for prettier photos, and not a retro filter. Blown highlights and grain in dark areas stay as the result of cutting. It does not weaken processing after a photo is already taken. It does not use multi-frame data such as Apple ProRAW. It changes the capture path: a single-frame Bayer RAW from the sensor is developed into a JPEG without the corrections you turned off. What you can turn off (set to zero / disabled): 1. HDR-style tone: lifts dark areas and holds bright ones (not multi-frame fusion) 2. Sharpening: makes edges look crisp 3. Noise reduction: smooths grain and color blotches 4. Lens distortion correction: fixes edge stretch from the lens 5. Look controls: detail, highlight/shadow recovery, moiré reduction, and similar finishing 6. Extended dynamic range (EDR) 7. Capture / develop “Auto”: hand-off to newer automatic processing (and related capture helpers) When a switch is On, we do not add our own look — we leave that item to iPhone’s default. What we cannot turn off: We cannot make iPhone image processing completely zero. These basics remain: • Minimum device preprocessing before RAW • Color conversion and the basic contrast curve needed for JPEG Modes and what “4S” means: • Simple: pick 4S, 8, or XS (this is where you start) • Detail: era slider plus the seven switches “4S”, “8”, and “XS” are not recreations of those iPhone cameras. They are a scale for how much processing is left on. Leftmost 4S means all seven corrections are off. Note: • Live viewfinder and the saved JPEG can differ in brightness and color. That is not a bug — the finder is an approximate preview. The saved photo is the result. • Requires a physical iPhone that can capture sensor Bayer RAW. Pricing (no subscription): Turning processing off to shoot stays free. • First 7 days: full access (nothing renews automatically) • After that (free tier): 4S (all seven off) shooting and JPEG save stay free • One-time ¥500: 8 / XS, Detail (seven switches), DNG save, crop, and shooting assist (non-consumable)
Screenshots
Verdict
The clearest difference is in-app purchases: JPG Optimizer at none against 4S Camera's 1. JPG Optimizer also leads on device support (3 vs 1). 4S Camera's advantage is ads (none vs shown) and update cadence (weekly vs every 3 months). On price and iOS requirement 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. 4S Camera sells 1 one-off in-app purchase. JPG Optimizer asks for nothing beyond the download.
JPG Optimizer ships an update every 3 months, 4S Camera weekly. The most recent releases landed on November 3, 2026 and November 10, 2026 respectively.
| Parameter | JPG Optimizer | 4S Camera |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 months | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, Mac — better | iPhone |
| Requires iOS | 17.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 141 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Mikhail Kuznetsov | TAKEHITO AWASHIMA |
In-app purchases
JPG Optimizer
No in-app purchases
4S Camera
- Full Unlock$2.99









