Mechanical release aides:I used to shoot fingers years ago but started loosing strength so I began to use mechanical release aides and let me tell you the difference was tremendous. My accuracy improved considerably. There are so many to choose from that it would take up to much space so I am only going to show you a few.

This is one that I used to use when I shot archery.
Cobra Pro Caliper ReleaseYou can count on a secure lock and a smooth release, even with the heaviest draw weights, using Cobra's Pro Caliper Release. The caliper style jaws provide an even, consistent release while protecting your bow string from wear and tear. Machined from solid aluminum, the Pro Caliper has a deluxe, curved gun-style trigger, black anodized release head with center release caliper-style jaws, stainless steel pins, a premium coil spring, and a chrome-moly pivot bearing for a consistently smooth release. The wrist strap comfortably transfers the pull of the draw to your wrist, and is available in either a suede buckle strap model or a leather, loop-lock fastener model, providing multiple adjustments to fit you perfectly.
| Deluxe, gun-style curved trigger Center-release caliper jaws Chrome-moly pivot bearing Padded wrist strap |

Here is one that is similiar but still different. I tried this one in the past and found it to not fit my hand comfortably but that is not to say that some one else might like it better.
Free Flight C-10 ReleaseThe C-10 Free Flight Release incorporates a unique glove design that distributes a bow's pull across the hand and wrist, making it seem like your bow is 10 lbs. less in draw weight. Because the trigger and release mechanism lie in the palm of your hand, this release will not add draw length and is always in position, ready for action. The Apparition® camo glove is constructed with 8 oz. leather covered with reinforced Cordura® Nylon, tough materials that will not stretch with extended use. Features a long, gun-like adjustable trigger, hardened steel components, and a wide roller that minimizes string wear.
Sizes: S, M, L, XL.
Available: Right-hand or Left-hand.

Here is one without the support of the wrap around wrist band.
This standard caliper release allows for two shooting styles: pushing thumb forward or pulling the index finger into the thumb. A torque-free 360° swivel provides ultimate flexibility. The trigger sensitivity adjustment is easily tweaked. Built with machined aluminum and steel construction, it has an inner ball/ramp firing mechanism and wishbone
| Allows for two shooting styles Torque-free 360° swivel Trigger sensitivity adjustment is easily tweaked |
double-ball jaws.

This one has a smaller wrist band and quicker and easier to put on.
Pro Release Trophy Hunter ReleaseYou get greater accuracy and drawing power when hunting or target shooting with the Trophy Hunter Release. These releases have a precision ball-bearing design with a swivel head for a crisp, frictionless arrow release. Serving saver bearings also are included, and each has an adjustable nylon wrist strap.
All in all there are different sizes, different camo patterns and slightly different mechanisms from one to the next. The important thing when picking one out is to try it in the store. Make sure it fits comfortably with ease of movement. Your finger should fit the trigger just like it would on a rifle.